I know exactly what you guys are talking about I'm 22 and my boyfriend is 29. I didn't start having sex till I was 18 and I never though it was something I couldn't live with out, during sex id be thinking about things I had to pick and was making lists in my head while I was having sex. But now I can't get enough... its crazy!! I even get turned down by my boyfriend now!! But I think I can explain this before I think I just wasn't with the right guys... i didn't have an organism till we started dating! I don't know what Im gonna do if we ever break up!!! lol