I read this hilarious post somewhere else on this forum (tried to find it again but couldn't) where a guy accidentally introduced his girlfriend by another girl's name, and then quickly said, "Oh, so if you're X, where the hell did I leave Y, and is oral gonna fix this?"
Oh, I found the post... it's Slick's post in the middle of this page :
4-vt8403.html?postdays=0&postorder=asc&start=45
I just think it's such a brilliant comeback, everyone should use it (though in your case perhaps it wasn't applicable, as you guys had already finished your couple of rounds, heh).
CHAT
I call myself on it and begin to describe an ugly girl I work with, as if I'm attracted to her unattractive qualities. I didn't get slapped, but I'm not sure if it worked. Fingers are crossed. 