Rabbi Aryeh Lebowitz

The Drash Asmaril in Hilchas Nisuan records the minhag.

and he attributes it to the smichas ha-psukim that we mentioned before.

Now, some think that the mar'il was saying that the minug was to not even wear a talus katan, but Tzitzal Yezer has a chuv in Chedek Chaf, Simul Chas, where he says, no, no, no one ever had that minug, to not wear a talus katan.

Talus katan you for sure wear before you get married.

The mar'il is referring to the minug not to wear a talus gadol until you get married.

But what would the basis for such a minug be other than this smichas ha-psukim?

So in the Tameyam in Hagim, he says in the Oztav Tavkuf Samech Zayin, that before getting married, a young man does not have an or hamakif.

And when he gets married, he earns this all-encompassing or that's symbolized by the kala walking around the chasin under the chuppah.

So that's also symbolized by wrapping one's body entirely in the talis.

Okay, the Radvaz in Chedek Aleph, Shemim Gimel, says that the entire purpose of a talis gandul is to be able to be mesateif and to cover your head.

And we know that Magan Avram writes in Siman Chas of Katan Gimel that a bacher doesn't cover his head, doesn't do an atifa with a talus over his head.

So the whole purpose of a talus gadol is to be able to do an atifa over your head.

And we're going to tell a bacher that he's not supposed to do an atifa over his head.

So there's no reason for a bacher to have a talus gadol.

Now it's notable that that Magan Avram that says that you should not have an atifa when you're a bacher, that you don't wrap a talus over your head when you're a bacher,

is not necessarily universally agreed upon.

I think Rav Shachta tells people when they get an aliyah here that they should put the towels over their head, even if they're a bachar, because having an atifa for Dvar Misha B'Kedusha overrides whatever that minag may be.

In fact, in the Chuvah Slavushay Mordechai, Arachayim Tinyan Asim and Beis, he says, V'Shamati Mipi Talmidei Hagon Bal Imrei Eish Tzatzal, Ki Bebeis Midrashu Gamabachrim Oyim Esadfim Al Roshayem.

There are many people that have such a minag, that are not necessarily like the Magan Havav.

Another possible basis is that same Chuvah Slavu She Mordechai, where he says that So you know where the minag came from?