lol Yeah, that would probably be the hymen. Push threw and don't look back. A little blood never hurt anyone. In fact, blood has been known to keep the living ... well ... living.

Just hope her parents didn't put a guillotine in there.
Oh, and Nego mentioned what face to make, but you also need a one-liner to say before you do it. My last devirginization of a girl necessitated the use of the line "For Sparta"