Is it the actual act of getting to pick the girl?
The anticipation of meeting one of us and wondering how good we are?
Is it the actual act of?

Tell me :-) I want to know!

But for me, what turns me on is getting to see what sexy guy I get to play with. And I can't speak for any of the other girls on here, but when I unzip your pants and get a peak of what's inside, it's like Christmas all over again! Lol.