Its already oppressive, as a human animal, to have to wear fake extra "skins" at all. I only do so, if i need warmth, want to avoid sunburn, dont want to get burned or scratched, if I need to be polite, approachable and acceptable in our textile culture, or if I want to avoid arrest for indecent exposure. Since none of these apply in bed i cannot imagine why anyone wears clothing while sleeping. In 6th grade class i learned that eskimos slept naked in igloos. The solution to cold isnt pants, its a better blanket.