the old virgin question again, it always comes up (no pun intended). I'm 28 and still the big v. For me there's several reasons why I remain untouched...
I'm quite shy and quiet when meeting new people (especially attractive women) and it takes along time time for me to be myself and to feel comfortable. I also blush easily which doesn't help matters.
I don't go out much which reduces my chances of meeting people, you could say I'm a introvert. The club and bar seen have never appealed to me, I also don't drink much.
I'm not that good looking....you get the picture, I could go on for ages.
To be honest the whole sex thing seems so far out of reach at the moment that it seems like I've got more chance of going to mars.