I am (still!) a virgin and have a question about the hymen. I know mine is not entirely intact, because I did a lot of horseback riding as a child. But as I'm not a tampon-user (nor wish to become one), I'm not exactly sure how painful intercourse will be, for the first time, nor what will happen to the hymen.

I always assumed it was a thin membrane that, upon penetration, would shrink evenly to the sides. But I seem to have what you might call a flesh tab, and though I've looked at pictures offered in Our Bodies, Ourselves, I'm not sure I understand how an opening will be created, and have the horrifying idea that a piece of flesh is going to drop out or be torn right out of me. Is it normal to have a flesh tab? What will happen to it? And if I tried inserting a tampon, would that facilitate the tearing process? Please help.

I am a twenty-three-year-old male who has a question about my scrotum. My scrotum seems to be tight up against my body, only sometimes does it drop a little lower. I thought that maybe my scrotum was just late in growing properly. Now I am not so sure. What should I do?

I have a weird question. My boyfriend and I were talking and he told me that men's balls move on their own throughout the day. I did not believe him so he showed me. He got undressed and laid back on the bed and told me to lift his penis and watch real close. I did and unbelievably, his balls moved. It's like they vibrated kind of like a heart beat. It was so cool. What makes a man's balls move alone?

Should a normal man's penis become erect for a certain number of times throughout one day (without any external stimulus)? Or, do these erections occur only while a man is sleeping? I have been masturbating once every day or every other day, and I have noticed that I rarely get any of those spontaneous erections during the day at all. Plus, I have been waking up with no morning erection during the past week. Have I been masturbating too much?

While reading some of your responses to female arousal, you say that the clitoris is as sensitive as the penis. Why is it then that when I touch mine, I get only a little pleasure, if any? Yes, I know where the clitoris is, so that's not the problem. What's wrong with me?

I saw Ben Wa balls in a sex store and it says they improve sexual pleasure by improving vaginal tone and can even be worn during sex — is this true? Do they work and are they pleasurable?