[Fido969]

A man should allow the woman to sit with her back against the wall, so her beauty radiates into the room.

Actually, it's to keep the guy focused on the woman.

Otherwise his eyes are wandering around and staring at every pair of boobs in the room. Then he wonders why she's pee-o'd when they leave the restaurant.

"Women!" he'll say. "Who can understand them?!"

[longtermmemmory]

I have also heard it the reverse so that way a man can see the room and protect the woman.