I have on occasions but I prefer wearing a single layer nylon nighties. Besides that my wife also prefers seeing me in a single layer nightie or a baby doll since it gives a hint of what is inside. That, just like seeing me wearing a sexy bra and panty set, turns my wife on ... And that is a good thing! ;-)
I don't think so. They prefer to wear formal clothing.
Kind of a no brainer if you have ever worn 2 layers of anything made out of nylon tricot. One layer feels good but 2 layers slide around--as do 3 from personal experience!