It is absolutely OK to sleep without pajamas or underwear. Nobody likes to feel restricted when they sleep.
Yes, it is ok to sleep without underwear because it may be more comfortable for some people and you're in the privacy of your bed.
Of course, unless your mom or dad says not to.
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
yes
Depends on what's more comfortable.
Because it's embarrassing if a teenage friend, or anyone for that matter, sees you in your pajamas. It's a male macho thing, nothing big. I'm a 21 year old guy and that's the reason why I didn't wear them to be honest :)