When a girl who is a virgin has sex for
the first time with a guy. A piece of skin inside of her vagina is moved once the guy has "put it in". Making her bleed. When your cherry is popped you only bleed
the first time. If the man is a virgin as well, this piece of skin is
replaced by the foreskin of the man. In this rare occurrence it is possible to pop a girls cherry a second time.