You know why this has really been an issue of late,maybe personal decision or not, guys are making this topic trend.So i will make this simple and straight.
perfectly safe to sleep without wearing panties – what you wear to bed is a
matter of personal preference. Some girls and women choose to sleep in the
nude, while others wear underwear and nightclothes. The only time when you
might need to wear panties is when you have your period. If you use pads,
you’ll definitely need underwear to hold your pad in place, and many women who
use tampons like to use a liner as well to keep them (and their sheets)