What do I do after sex? Should I just lay there? Should I talk about it?

I don't know what I did wrong. My girlfriend of one and a half years broke up with me out of the blue. We never fought or argued. I asked her why, she said "I don't know." I asked her what did I do wrong and she said "nothing." She was my first ever girlfriend and I was planning to ask her to marry me. I don't understand what I did wrong. There has to be a reason. Why won't she tell me?

I am a 19-year-old college student and am seriously involved with my boyfriend who is a 20-year-old college student. We have even talked of getting married someday. Our relationship is very close and we talk about everything, and he is very wonderful and supportive. I feel very committed to him and would really like to have sex with him. We have tried twice, but it hasn't really worked out because my vagina is too tight. I am pretty sure the problem is just that it needs to be stretched more, because I have been to the gynecologist and don't have any infections. He says that he is okay with whatever we do and that he loves me no matter what, but I still feel guilty about not being able to go all the way. How do I get over this guilt? I will be leaving college for the summer soon and we will be separated for awhile and I want to make sure that our relationship is as solid as possible before I leave so we have the absolute best chances of surviving the summer!

I am an 18-year-old male. And I lost my ability to reproduce in a bull riding accident at a rodeo I competed in about two years ago. I would like to father children more than anything. And now I have a girlfriend who is talking of wanting to have kids in the future. But I can't bring myself to tell her that I can't because I still haven't dealt with the problem of coping with it myself. I need to know how to deal with the fact I cannot have kids, especially now that my significant other wants them, but is ignorant to the fact that I am sterile. Please help me ASAP! This is tearing me apart.

I don't know what love is. My family thinks it's a kind of trade, or reciprocity. If they do for me, they demand "love" in return. I'm pretty sure that isn't love. I'm an adult now, and have no desire to be indebted to anyone, hence I don't pursue relationships. But I'm pretty sure love isn't reciprocity, and I know I've never felt love. How does one go about learning to love?

I tried looking through all of the letters, and even tried searching, but I didn't see anything pertaining to this:

I've never had a blow job, but would like one...some day...:) I was wondering, if, when you peak, if it's acceptable to just let yourself cum inside the person's mouth? Should you give a warning? Should you attempt to restrain from it?

I realize this question may sound rather juvenile, but who else can I turn to?

What's the difference between a vaginal and clitoral orgasm? Is it only possible to have a vaginal orgasm during intercourse? If you can have a clitoral orgasm through other activity, but not intercourse, why is that? If your clitoris is stimulated during intercourse, will that give you a clitoral orgasm during sex? So how do you have a vaginal one? Can you have both at the same time?

My "best friend" of almost 4 years now has always been competitive, but it's never been something we've discussed. Every time I'm wearing something trendy or saying something new, she will do the same thing. When we used to run in aerobics class, she would constantly try to beat my scores. I confronted her about that, but she never seems to learn — she still copies me and competes with everything from grades to guys. If I address the problems I've had in the past, I will look stupid because usually I would be the type to bring it up, but my life was too hectic at the time. Should I really "waste" time talking to her about her competitiveness? Or, is there a way to hint at it or persuade her to do something original?