I have a lot to say on this subject. When I finally started dating (and having sex) at 27, I was such a weird abnormality. My experience & maturity level was the equivalent of a teenage girl (and an early teenager no less), but the men I wanted to date had been dating 10-20 years. You truly don't have any peers of your same age with a similar level of experience or expectations.
I still too this day (10+ years) later, have a hard time with my emotional maturity and expectations compared to the guys I am dating. I still have a lot to make up for, but I still deal with the guilt, fear, etc that comes with our background. I can have sex without commitment occasionally, but i'm still not as active as most single people my age.