And as for sleeping fashions, I wear nothing at all to bed.

I don't know about the rest of you guys, but the natural biproduct of REM sleep for me is the condition of Dr. Jekyll becoming Mr. Impossible-to-Hyde. Underwear of any kind becomes far too confining, several times a night in fact. I've got enough misery waking up and having to pee really badly, while Gunnery Sergeant Dick is manning his post like one of the Queen's Guard.