Do you really know?
Episodes
Why do we get the post-sex blues?
22 Jan 2026
Contributed by Lukas
If you’ve ever felt strangely sad after having sex, you may have wondered what on earth was wrong with you. After all, we’re supposed to lie aroun...
What is synthetic fuel?
22 Jan 2026
Contributed by Lukas
For a number of years now, we’ve been hearing that the future of transport is electric, in particular due to the impact of fossil fuels on global wa...
What is Quantum medicine and is it a scam?
21 Jan 2026
Contributed by Lukas
In January 2024, the renowned French perfumery Guerlain is set to unveil a groundbreaking range of products inspired by quantum physics. Their marketi...
Why do we cry when we cut onions?
21 Jan 2026
Contributed by Lukas
Ending up in tears when preparing a dish with onions can be pretty darn inconvenient. No sooner have you started chopping them up, you find your eyes ...
Why does walking through doorways make us forget things?
21 Jan 2026
Contributed by Lukas
Have you ever walked into your living room, kitchen or bedroom and completely forgotten what you went there for? It can be pretty annoying, and a litt...
What is shy bladder syndrome?
20 Jan 2026
Contributed by Lukas
Today, we're going to talk about a condition that affects millions of people around the world, but is rarely discussed openly. It's called shy bladder...
What are the four types of attachment in our relationships?
20 Jan 2026
Contributed by Lukas
The types of attachment were theorized by British psychologist John Bowlby in the 1950s. They are widely used to help us understand how we react to si...
How to spot, prevent and treat heatstroke ?
20 Jan 2026
Contributed by Lukas
Heatstroke is a medical emergency that happens when your body temperature gets too high and you cannot cool down. This can harm your vital organs and ...
What is Blue Monday?
19 Jan 2026
Contributed by Lukas
Sorry to end the week with bad news but tomorrow, January 16th, is Blue Monday, often cited as the most depressing day of the year. Blue Monday has ex...
Are smoothies actually good for you?
19 Jan 2026
Contributed by Lukas
Smoothies can be seen pretty prominently in organic food stores and supermarkets during the summer. They’ve been a popular choice for years now and ...
Which colours go well together according to science?
19 Jan 2026
Contributed by Lukas
It's often said that colour preferences are simply a matter of personal taste, but actually some have been backed up by science, especially in the fie...
What are the best ways to reuse my household waste?
18 Jan 2026
Contributed by Lukas
November is synonymous with Black Friday, great deals but what cost? Over consumption is endangering our already fragile planet. Is it time to change ...
Could the 42% rule help me have a better work-life balance?
18 Jan 2026
Contributed by Lukas
More and more people across the world are struggling with burnout. According to a Future Forum survey of over 10,000 workers from February 2023, as ma...
What is the Smurfette Principle?
18 Jan 2026
Contributed by Lukas
Does that ring a bell? How many of you spent hours in front of the Smurfs as children? We’re sure you remember the smiley little girl with blond hai...
Does olive oil really make you fat?
17 Jan 2026
Contributed by Lukas
Olive oil, a cornerstone of the Mediterranean diet, boasts a rich composition of essential fatty acids, vitamins A, D, E, and K, along with polyphenol...
What is auto-brewery syndrome?
17 Jan 2026
Contributed by Lukas
Imagine being drunk, without having drunk a single drop of alcohol, it seems completely implausible, and yet for some is a reality. South-West media s...
Which conspiracy theories were actually true?
17 Jan 2026
Contributed by Lukas
The origins of Covid-19 still remain somewhat hazy, over three-and-a-half years since the virus began spreading across the world. That has led to a nu...
How can I stop micro-awakenings from disrupting my sleep?
16 Jan 2026
Contributed by Lukas
According to a Direct Line Group study from 2022, over 70% of UK adults don’t get the recommended 7-9 hours of sleep per night. Nighttime micro-awa...
What Is Orthosomnia, this new sleep disorder?
16 Jan 2026
Contributed by Lukas
Nearly one in three adults in the UK experiences symptoms of insomnia. On average, adults in the UK get about 7.6 hours of sleep per night. In recent ...
Why do friend breakups hurt so much?
16 Jan 2026
Contributed by Lukas
We all know that getting over romantic relationships can take time, sometimes weeks, months or years. Many poems, songs and film scenes have been dedi...
Can our bodies really catch up on lost sleep?
15 Jan 2026
Contributed by Lukas
We talk about sleep needs a lot on Do You Really Know, so regular listeners will be well aware that we need 7-9 hours each day, and that not getting e...
Can jellyfish offer the key to immortality?
15 Jan 2026
Contributed by Lukas
Throughout history people have been keen to find the answer to immortality. It's now commonly accepted that eternal life is not possible. Yet, somewhe...
How can I avoid always feeling hungry?
15 Jan 2026
Contributed by Lukas
The feeling of hunger can be difficult to explain sometimes, especially if you feel like you've eaten as much as you usually do. As a result, we often...
Could insects replace meat?
14 Jan 2026
Contributed by Lukas
Although it is quite usual to find insects in markets in both Africa and Asia it is rather more unusual for people in the West to eat them. However, ...
Do aphrodisiacs really work?
14 Jan 2026
Contributed by Lukas
You’ve no doubt heard that certain foods can increase desire, or even improve sexual performance. Oysters, ginger, chocolate and strawberries are ju...
Are women really more emotional than men?
14 Jan 2026
Contributed by Lukas
"Irrational”, “overdramatic”, “hysterical”, “sensitive” - if you’re a woman you have most likely been described using one of these wor...
Why is physical contact important for our health?
13 Jan 2026
Contributed by Lukas
When it comes to expressions about skin, the English language is not lacking. For example, we can be thick or thin skinned, or have someone under our ...
What is Hugh Jackman’s 85% rule?
13 Jan 2026
Contributed by Lukas
You may know Hugh Jackman as the star of X-Men, The Greatest Showman, and Les Misérables, but did you know that he has a secret to success that invol...
Why are some people constantly sexually aroused?
13 Jan 2026
Contributed by Lukas
The condition we’re going to talk about today is pretty rare. It affects around 1% of women, but it can really disrupt the lives of those who suffer...
What is sex surrogacy, the controversial sex therapy?
12 Jan 2026
Contributed by Lukas
It may be a little taboo to talk about it, but there are a lot of people out there who, for a variety of reasons, don’t have as much sex as they wou...
How could the 52 week method help me save money?
12 Jan 2026
Contributed by Lukas
Let’s be honest; who among us doesn’t daydream about having saving money effortlessly? The new year period is often synonymous with ambitious reso...
Why do people say the soul weighs 21 grams ?
11 Jan 2026
Contributed by Lukas
A small chocolate bar. A tablespoon of honey. A hummingbird. Those are a few different things that weigh around 21g. And you can add the human soul to...
What is a ‘lazy girl’ job?
11 Jan 2026
Contributed by Lukas
A lazy girl job is an easy, enjoyable and well-paid job that doesn’t require much passion or effort, and leaves you with plenty of time to live your...
How can you beat hangxiety?
11 Jan 2026
Contributed by Lukas
If you drink alcohol, the chances are that on occasion you’ve overdone it and drunk way more than you planned to. Or maybe you decided to let yourse...
What are the health impacts of taking public transport?
10 Jan 2026
Contributed by Lukas
According to UK government data, a total of 6.5 billion passenger journeys were completed using public transport vehicles like buses, trains and tram ...
Why do we sweat?
10 Jan 2026
Contributed by Lukas
The last week or so has seen temperatures reach around 20° in the south of England, and you can expect to see similar temperatures for the next month...
How can social media exposure lead to vicarious trauma?
10 Jan 2026
Contributed by Lukas
Social media has been part of our daily digital lives for nearly two decades now, and while there are plenty of positives associated with it, there’...
How can I influence my dreams?
09 Jan 2026
Contributed by Lukas
How our brains work during dreams is as fascinating as it is mysterious. Dreams can be hard to predict, and sometimes of course we end up having night...
Could using lube help you get more pleasure from sex?
09 Jan 2026
Contributed by Lukas
Whether it’s out of necessity or for enjoyment, lubricant helps a lot of people in their sex lives. According to The Cleveland Clinic: “Around 17%...
What is Wendy Syndrome?
09 Jan 2026
Contributed by Lukas
Think back to the story of Peter Pan, and more specifically the character of Wendy Darling, Peter’s friend who accompanies him to Neverland. She’s...
Are our perfumes toxic?
08 Jan 2026
Contributed by Lukas
Perfume is a luxury product worn by people all around the world, but fragrances are not without health risks. Perfumes use a mix of chemicals, some ar...
Why are voice notes so divisive?
08 Jan 2026
Contributed by Lukas
According to Whatsapp, over 7 billion voice notes are sent on the app every day. A lot of the time, they offer a more personal touch and clearer expla...
Do we have sex often enough?
08 Jan 2026
Contributed by Lukas
Despite its many benefits, sex can also bring on a bit of stress at times. You feel like you have to fit into a certain mould. Have sex often enough, ...
How can I protect myself from bank card skimming?
07 Jan 2026
Contributed by Lukas
Using an ATM, paying for petrol or shopping at a retail store are pretty routine things that many of us do on a frequent basis. But it’s important t...
Is skipping meals bad for you?
07 Jan 2026
Contributed by Lukas
No doubt at some point in your life you’ve skipped a meal, whether it was to save money, lose weight or just because you were too damn busy with wor...
Is it a good idea to fall asleep to music?
07 Jan 2026
Contributed by Lukas
Many of us have a ritual of falling asleep to our favorite tunes or a comforting podcast. It’s no surprise we find solace in this routine; after all...
What’s the "Cuffing Season" everyone's talking about right now?
06 Jan 2026
Contributed by Lukas
The "cuffing season" refers to that time of year—typically from October through February—when people are more likely to pair up. It’s not about ...
How can I recognise a flying monkey, the narcissistic abuser’s best friend?
06 Jan 2026
Contributed by Lukas
We’ve already talked about narcissistic abusers in a previous episode of Do You Really Know? Let’s refresh your memory: narcissistic abusers, or N...
What is white privilege?
06 Jan 2026
Contributed by Lukas
Like a lot of things, the concept of white privilege comes from the USA. It means that simply being white gives a person additional benefits or rights...
What is the romance gap?
05 Jan 2026
Contributed by Lukas
There’s certainly been a lot of progress in breaking down gender roles since the turn of the century, but still traditional expectations persist in ...
What are the best natural remedies for insomnia?
05 Jan 2026
Contributed by Lukas
Not being able to fall asleep at night can be incredibly frustrating. You’re tossing and turning, exhausted but unable to drift off. If this sounds ...
What is the butterfly effect and how does it affect our lives?
05 Jan 2026
Contributed by Lukas
The butterfly effect is the idea that a small change in one part of the world can have huge consequences in another. It is often used as a metaphor fo...
Is the five second rule a real thing?
04 Jan 2026
Contributed by Lukas
How do you react when a piece of food you’re eating falls to the floor? Some people would throw it away in disgust, while others would still eat it,...
Does a 'lifetime guarantee' really mean for life?
04 Jan 2026
Contributed by Lukas
In this age of responsible and measured consumption, we’re tending to turn more and more towards products with a long lifespan and a good guarantee....
Why are my ears ringing?
04 Jan 2026
Contributed by Lukas
It’s not uncommon to hear ringing, buzzing, humming or hissing sounds that can’t be heard by anyone else. The medical term for these symptoms is t...
What happens to our bodies when we do Dry January?
03 Jan 2026
Contributed by Lukas
You’re most likely familiar with the concept of Dry January, which started out in the UK in 2013 and has since become hugely popular. It involves no...
Is sleeping with my phone dangerous ?
03 Jan 2026
Contributed by Lukas
Smartphones only really entered our lives within the last 10 to 15 years, but they’ve since become indispensable. And it can even be hard to put the...
Which foods shouldn't be eaten together?
03 Jan 2026
Contributed by Lukas
Avoiding weight gain is just so difficult sometimes, isn’t it? It’s not enough to eat only healthy foods, you also have to combine those healthy f...
What are umbrella species?
02 Jan 2026
Contributed by Lukas
Within an ecosystem there are many different species, and it can be difficult for conservationists to come up with specific strategies to protect ever...
Why does time go by faster with age?
02 Jan 2026
Contributed by Lukas
Do you remember how as a kid, it would always seem like an eternity waiting for Christmas or your birthday to come around? But having reached adulthoo...
What's the best time of day to have sex?
01 Jan 2026
Contributed by Lukas
Over the years, many surveys have looked into what time of day people say they most enjoy having sex, but the findings have varied drastically. For i...
Why does the year begin on January 1st?
01 Jan 2026
Contributed by Lukas
As we embrace resolutions and light up the skies with fireworks, it's time to mark the arrival of the New Year! All of us on the Do You Really Know te...
How can I sleep well with a blocked nose?
01 Jan 2026
Contributed by Lukas
It’s not uncommon for rhinoviruses to resurface during the spring and autumn seasons. They’re the main cause of the common cold. At the same time,...
Why is going to the cinema so romantic?
31 Dec 2025
Contributed by Lukas
As date night options go, the cinema is a timeless classic which can be both fun and romantic. Even in the age of “Netflix and chill”, there’s a...
Why are there more single people than ever before?
31 Dec 2025
Contributed by Lukas
In the 2020s, we’re living in an era where there's never been more different ways to find a new partner. For a start, just think of all the dating...
Why are mini animals so popular?
30 Dec 2025
Contributed by Lukas
In late March 2024, french actor Pierre Niney took to TikTok to reveal his newest love affair—not with a co-star, but with an adorable miniature don...
What is Stendhal syndrome?
30 Dec 2025
Contributed by Lukas
What is Stendhal syndrome? Stendhal’s syndrome is a rare and unusual psychological disorder. It’s a psychosomatic condition whereby certain peopl...
Could the Pomodoro technique help me work better ?
30 Dec 2025
Contributed by Lukas
Do you ever feel like time is slipping through your fingers? That you had several hours to complete one or two simple tasks, but you didn't notice the...
What are the best hangover foods?
30 Dec 2025
Contributed by Lukas
If you wake up feeling rough after a night of heavy drinking, it's likely your liver couldn't handle all that alcohol, and your body couldn't flush it...
What is wellness syndrome?
29 Dec 2025
Contributed by Lukas
"Here’s my yoga instructor’s number”, "You must try this detox juice", "Download this diet app right now!". Have you ever heard people give this...
Why do we get addicted to social media?
29 Dec 2025
Contributed by Lukas
A report from CyberCrew revealed how UK residents spend an average of 110 minutes per day on social media. Many of us start scrolling before we’ve e...
How can I work better from home?
29 Dec 2025
Contributed by Lukas
Remote work was thrust upon many companies as soon as the Covid-19 pandemic hit. All of a sudden, workers had to perform their job effectively in a pr...
Should you sleep with socks on?
28 Dec 2025
Contributed by Lukas
For many, slipping into socks before bed is as natural as brushing their teeth. It’s comforting, like a warm hug for your feet. But not everyone’...
Why do we get bad breath in the morning?
28 Dec 2025
Contributed by Lukas
According to The Cleveland Clinic, around one in four people are affected by bad breath. It’s also known as halitosis and bad breath can be a source...
Could the one-week method help you stop drinking?
28 Dec 2025
Contributed by Lukas
Some psychological and addiction experts say that making and sticking to resolutions can do wonders for your health. And just because it’s not the N...
How can I return unwanted gifts?
27 Dec 2025
Contributed by Lukas
It’s great to be remembered by friends, colleagues, and family at Christmas, but despite people’s best intentions, they don't always get you what ...
Is it best sleeping in total darkness?
27 Dec 2025
Contributed by Lukas
Almost all kids are afraid of the dark, and sometimes that fear even lingers into adulthood. It's a shame really because, contrary to what you might t...
Which foods change our body odour?
27 Dec 2025
Contributed by Lukas
Did you know that each of us has a truly unique body odour, which is influenced by a mix of genetic, hormonal, age-related, environmental, and lifesty...
How can I protect my mental health during the holiday season?
26 Dec 2025
Contributed by Lukas
Christmas is seen as a season of joy, but it can also be a testing time for many people, whether it’s mentally, emotionally, physically or financial...
Are girls really worse at maths?
26 Dec 2025
Contributed by Lukas
According to the UK’s Department for Education, girls still make up fewer students choosing A-level maths and physics and even fewer go on to study ...
What is a faecal transplant?
26 Dec 2025
Contributed by Lukas
Faecal transplant, also known as faecal microbiota transplantation or FMT, is the transfer of stool from a healthy donor to a patient with a disease. ...
What's the right way to burst a pimple?
25 Dec 2025
Contributed by Lukas
If there are any teenagers out there listening in, chances are you have faced an acne breakout at some point in the recent past, or perhaps you're eve...
Should I eat starchy foods in the evening?
25 Dec 2025
Contributed by Lukas
After clocking out, who doesn’t crave a hearty meal after a hard day's work? But here’s the thing: your dinner choices could be tipping the scales...
Is the gut really our "second brain"?
25 Dec 2025
Contributed by Lukas
You have surely felt butterflies in your stomach before a big event or had a ‘gut’ feeling about something. You might even say you need to ‘dige...
What are the strangest Christmas traditions?
24 Dec 2025
Contributed by Lukas
In the Western world, we celebrate Christmas on December 25th to honour the birth of Jesus, a tradition dating back to around the year 300 AD. But wel...
Could AI kill off filmmaking?
24 Dec 2025
Contributed by Lukas
In September 2025, Dutch production company Xicoia caused quite the stir in Hollywood. At the Zueich film festival they unveiled Tilly Norwood: the wo...
How can I choose the right mattress for me?
24 Dec 2025
Contributed by Lukas
Getting restorative sleep and putting an end to back pain are both good reasons to opt for quality bedding. And if another reason was needed: on avera...
What are the best ways to keep warm outdoors?
23 Dec 2025
Contributed by Lukas
A lot of people are reluctant to go out in the cold during the winter season. It's a real shame, as there are many ways in which you can protect yours...
Are additives bad for your health?
23 Dec 2025
Contributed by Lukas
According to The Sun, scientists say that “the average person in the UK now consumes more than eight kilograms of chemical additives every year.” ...
Do "light" food products really help you lose weight?
23 Dec 2025
Contributed by Lukas
If you believe the marketing slogans printed on their packaging, light or reduced-calorie food products offer you the same enjoyment but with fewer ca...
What is Christmas tree syndrome?
22 Dec 2025
Contributed by Lukas
Sniffling, sneezing, itchy eyes, asthma flare-ups, and even sleep disruptions. If you're wondering why you're dealing with all the telltale signs of h...
How to choose the best detergent?
22 Dec 2025
Contributed by Lukas
In the days of yore, clothes were scrubbed with soap, brushes, and sheer elbow grease. But today, laundry detergents have revolutionized the way we cl...
What makes us ticklish?
22 Dec 2025
Contributed by Lukas
Whether it’s as kids in the school playground, fooling around with our first partner as a teenager or with our own kids when we become parents, tick...
Why is panto a Christmas tradition in the UK?
21 Dec 2025
Contributed by Lukas
Panto, short for pantomime, has become a staple of British Christmas celebrations but surprisingly its origins are neither British or Christmassy. It ...
How can I avoid the side effects of antibiotics?
21 Dec 2025
Contributed by Lukas
Antibiotics are critical to modern medicine, and have saved millions of lives since first being introduced in the mid-20th century. However, there are...
Could vanlife be a lifestyle choice for you?
21 Dec 2025
Contributed by Lukas
he last two and a half years have caused a lot of us to reassess our priorities in life. Are we really living our lives to the full? Are there new exp...
Why does Christmas boost our libido?
20 Dec 2025
Contributed by Lukas
According to a study published in the Scientific Reports journal in 2017, the holiday season sees a peak in sex-related searches on Google and Twitt...
What are the most hydrating foods?
20 Dec 2025
Contributed by Lukas
We all know staying hydrated is crucial for feeling fit and healthy. The general recommendation is to drink between 1.5 to 2 litres of water a day. B...
Can women really get a core-gasm from exercise?
20 Dec 2025
Contributed by Lukas
We all know that exercise does wonders for our bodies. But what might come as a surprise is that it can even bring us to climax, at least for women. N...
Can humans really fall in love with AI ?
19 Dec 2025
Contributed by Lukas
According to data from Writer Buddy, Character.Ai ranks as the second most used AI tool behind ChatGPT. It received 3.8 billion visits in the twelve m...