Although I'm happy to be one and this is indeed a rare breed in modern males.
The thing is, I know that I could "get" sex...I'm reasonably attractive, charming (apparently) and I do receive a fair amount of interest from the opposite sex. Now if I was really insecure about myself then I wouldn't comfortable with being a 21 year old virgin but fortunately I'm not (about this at least).
There are times when I get stupidly horny and it's just like being 15 again, this can be frustrating but I don't mind. I don't actively avoid meaningless sexual encounters (not any more, anyway) and if certain females were to make there intention clear, I would find it hard to resist, I can admit that.
I haven't been in a relationship with anyone special enough to share this experience with yet. I sometimes feel that I'm waiting too long but it would be a waste to ruin it now, all these years of self control and what for?
I really don't know why I thought I'd confess this on the internet.