I have no reservations when I have casual sex. However when one of these flings turns into a relationship and things get serious I don't want to have sex with them anymore. It has happened with my last three boyfriends and has been the primary reason for my breakups. It feels like a normal relationship...we are best friends, we do almost everything together, I care about him tremendously, but I get scared when he wants to have sex. Why can I only have emotionally detached sex?

I'm 16 and have been with my boyriend, also 16, for 5 months. He has only ever fingered me as I don't really like the thought of other sexual activities too appealing but feel I am ready for sex as it is a way to be as physically close to him as I am emotionally.

My only problem is is that my opening is really tight and can fit about 2 fingers maximum-- sorry this sounds disgusting? His friends tell me about his "massive penis" and I'm scared he won't be able to fit it in. We have spoken about sex and both agreed that we want to do it, but now I'm just nervous that it won't go as I'd always expected it because I'm too tight? Please help.