Thanks all,
Sorry I have been remiss. Here is the thing - the guy obsessed with sex who I had the encounter with thought it was really weird I did not seem into sex. He did not understand why I did not check out men on the street - quite frankly, I hate getting odd glances on the train, so would hate to be a perpetrator. Then I thought he was psycho for being obsessed. Like one of my favorite rockstars said once, "sex is a part of life, and those who think sex is terrible are freaks ... instead if the people who understand it is an everyday part of life"/
I feel like if I ever met a guy I actually truly liked, that based on all the advice here, I would have to let him know immediately I am not into casual sex. But then he will wonder when the time is right, and I will too. Then I worry about how awkward it will feel for me.
Its like if you have too much sex, you are condemned by society, and if you do not, you are also condemned. Still feel sh***y about the whole experience.