She did'nt know mine either. Long story, but at times I'd get bored with the usual stuff, so I played around a lot and "tested" myself and what I can do with the opposite sex.
I went up to this chick and the first thing I said was "Don't tell me your name." LOL She was a little weirded out but it gets better. We just started talking and stuff, she asked "why not" about the name thing, and I told her "Because I don't want to know it, don't tell me" Hey, as long as she was cool with it, I was staying the course. So I asked her out finally and she agreed. I think her curiosity made her lean towards accepting the proposal for a date a little. Hey, I'll take it.
So we went out and NEVER called each other by our names. WE DID'NT KNOW THEM! The sex was fucking awesome! It was like having sex with a stranger EVER TIMEA we did it. It felt like we were spies or something weird. It was really a rush. You have to experience it to really feel it.
Anyway, we were just sort of fuck buddies for a few months and it ended. Great fucking time. Lasted about 3.5 months.
Try it. Go out and pick up a girl without exchanging names. Do it.