Ah, and to address Spladle from the previous page, it is cool that you have not HAD to sleep with sombody you might otherwise not, but we cannot all be golden youth. I met very few people in my time that I felt superior to, that I would say no to because I deemed them unworthy of sex, if they were clean and halfway sane they are as good as me. Most of my partners I would have loved to spend many more nights/days with, but most were great till they came, and then they just vanished into their hedonism never to meet again.
I also want to point out, you turned 20 today, again happy birthday, but it also means you have decades of experience to come. Part of that, unless you marry, will be one night stands eventually. Though it is not nearly as common in straight men as with gay men like myself. And, it would probably not be so with us if we COULD marry. If we could we would and you would see faithfulness and domesticity replace promiscuity to at least the same degree as heterosuperior types enjoy.