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

That said, coming from someone new to the hobby, it starts with looking through postings, doing research on the providers, and then finding the one I want to book with. But as far as the actual visit, the more they are into it, the more I am. Thats why I get totally turned on when they are having their own peaks of pleasure.