Seems like it would help keep the shorts from getting stinky.
Edit 1: friction is the answer
Edit 2: sorry for this edit – i was trying to make a new post, but Blorp for some reason took me to editing this one instead. Trying to put it back the way it was…


I have lots of underwear, only few bike shorts.
I wear underwear to protect clothes.
I don’t wear underwear under underwear because i don’t need to protect it.
So it must be a different reason from that.