Why would I wear clothes in bed ? So much more comfy without clothes on. But in my period I wear panties of course. When it's really cold outside I have a heating electric blanket that warms my bed before I get in.
usually naked (I wear panties the first night of my period as it can get messy), but when it's cold and it often is here in the UK between October & May, I sometimes wear a nighty.
If its possible, i always prefer to sleep naked. If im sharing a bed, or even room, with someone platonically though ill wear a tank top and undies at least. The same goes for sleeping privately in an unfamiliar place.
I sleep naked all the time except when it's really cold. I find that wearing underwear binds up in my crouch and is very uncomfortable.