Kate Legge

And also if you've watched parents separate and perhaps be happier afterwards, you know, it reinforces the idea that maybe that's the way to go.

So that rather than fixing up the leaky house and repairing the roof and putting new hinges on the door, you just leave and start a new relationship.

Look, I know there can't be a really good answer to this question, but I'm going to ask it anyway, Kate.

Do we know how common infidelity is in modern marriage in Western societies?

No.

Look, all the surveys suggest, conservative estimates suggest it happens in 25% of marriages.

But, you know, they're relying on surveys by people who are prone to massaging the truth, very often kidding themselves.

So there's a very rubbery... And willing to step forward and self-identify.

No one.

Because secrecy is the, you know, humidity crib for an affair.

I mean, that's how it thrives.

And it's also the excitement and the frisson of doing something behind someone's back and not telling anybody about it.

And that's how they live.

Now, it's commonly thought, and it's hard to raise this as an issue because you tend to get clobbered for saying this is a good thing, but it's commonly thought that men are more predisposed towards having multiple relationships with women, the ones that are heterosexual in any case, because of some kind of predisposition to spread the seed more widely.

Where is biology?

Where did you find that biology is on this evolutionary biology?

What are they saying?

Is there truth to that?

Well, I think that we all assume it's really a generalisation, it's a stereotype that that's what men are like.

I don't think so.