It is absolutely OK to sleep without pajamas or underwear. Nobody likes to feel restricted when they sleep.
Of course, you don't have to wear anything to go to sleep or to bed.
Of course, unless your mom or dad says not to.
Yes as long as your parts don't suck the in fly's of your jeans
I would think his underwear. A lot of young boys sleep in their underwear.
Sans is Old French for "without." So 'sans underwear' means "without underwear."
All the guys in TH has said they sleep in their underwear.
You need to wear loose, cotton underwear and you can sleep on your back or side.
Girls should sleep in cotton to prevent infections.
You should sleep any way that you feel comfortable. Most boys sleep in boxers
Depends on what's more comfortable.
It isn't necessary bad to wear underwear when you sleep, some people like the comfort of being totally nude and the feeling of the sheets agains they bodies.