Respond with a quip about how your boyfriend is so small, that you are practically still a virgin ... that way, your ex will leave in embarrassment and your dad will change the subject before he learns anymore details that he never wanted to know.

And some say chivalry is dead.

hope your dad beat the shit out of him.

How pathetic do you have to be to do something like that?

What a dick. I swear I would pick up the phone and tell the same story to his mother.

Your ex has some brass balls.

just say you're still a virgin, he didn't have the apparent equipment size.

Get revenge by telling his mother every disgusting thing he ever did to you so she'll teach him not to be a pig.

He may have taken your virginity, but he's obviously still not a man.

Chop his nuts off