Eli5:what muscles are responsible for the cringe sensation? Why does your body react the way it does when such an event occurs?

Question

Eli5:what muscles are responsible for the cringe sensation? Why does your body react the way it does when such an event occurs?

In: Biology

Answer 1

Like i hear a story about man or woman hitting the center bar on a bike with their crotch, i immediately close my legs and grab crotch. Or the vids where the person falls real bad.
Im probably overreacting to some degree.