Rabbi

that, no, they're going into a room together, and everybody knows they're not going to be having Tashmish, because they're coming out ten minutes later, and they have a wedding to celebrate.

Everybody knows that they just want to spend some time together before they go, and celebrate with all the guests.

And that does not seem to be at all a breach of Tzinias.

But anyway, that's the argument, one of the arguments Yitzchak Yosef makes.

The stronger argument, and the one that is more prevalent,

is that the reason that Sephardim don't do Yichud at the wedding is because, because it completes the Nisuin.

And since it completes the Nisuin, according to the Rambam and the Mechaber, she would then need to cover her hair if they had Yichud.

And most Kalas don't want to cover their hair at the wedding.

So she would need to put on a sheitel right away.

she would need to put on a tichel or something right away at the yichud, and most women do not want to be covering their hair at their wedding, so they wait until after the wedding to complete the marriage, so that they won't have to cover their hair until afterwards.

Rabbi Willig often points out that really full hair covering is only required

after Bia Rishonah.

It's not Nisuan, that's the Mechayev of hair covering.

There's a major Machlogsha Poskan.

There are Poskan that hold that from Aresin and on, you already need full hair covering, and therefore a Kala's got to even go to the Chuppah, march down the aisle with a full hair covering.

There are those that suggest...

that it's only at Nisuin, and then Rav Willick suggests, and many others, that it's only from the B'yari Shona, because the chiv to cover a hair is derived from the Pesukim Parshas Nasa, that is Sotah, and a woman cannot become a Sotah until B'yas Mitzvah, so perhaps the covering of the hair, the obligation begins at the B'yas Mitzvah.

So the only requirement at the wedding itself to have any sort of hair covering at the wedding itself is based on the description that the Mishnayis have in Masechas K'subas of a color that's Yotze B'Hinumah, that there's something...

There's some sort of head covering that's indicative of being a kala.

So that's why Rav Shachter recommends to kalas that they should wear their veil throughout the wedding, not over their face, but on their head, that the veil should be there, that there should be some form of head covering