A chastity belt is a harness that is made to fit around the waist, blocking access to the naughty parts, thus preventing sex. Kinda like wearing a Star Trek belt.
Don't have sex, because you will get pregnant and die!
— Coach Carr, Mean Girls
"I don't know why but I always find I sympathize a lot less with characters after they lose their virginity."
"I guess what they say is true... sex kills.
— Junie Harper, King of the Hill