Does anal sex make your hips and bottom larger?

My boy friend is 15, has never had an erection and every time we want to have sex we can't. He thought it might be a medical problem but he asked the doctor and said no medical problem here. We have tried everything. The first thing we tried was dry humping and nothing happened and then I tried grinding him they say that can be very arousing but it didn't work. I let him look at porn and nothing happened. More suggestions?

Ok, I'm almost 14 and I have not started my period yet. I'm short (4 foot 11 inches) and I don't know if that would affect me not having it yet. I have cramps like the ones you would have before your period but then...nothing. I'm an active person, but normally active, not overly active and not a couch potato. All of my friends at school have already started. Although I'm glad I don't have to worry about something else in my life, I don't know if its normal or not for me not to have my period. Please help, thanks!

I'm a 14 year old guy, and basically, I've had trouble not really "thinking" about sex. I know its my hormones and growing up, but really, how can you, calm sexual desires down, and, I'm going to a party next week, with lots of girls. So, can you help?

I have been on the Cyclin contraceptive pill for about 4 months now. Before that I was on Diane 35. I understand that the bleeding that occurs when we are on the pill is not technically a period because we have not ovulated and therefore have not released an egg. My question is, in that case, where do the eggs go?

Why are my nipples small?

I'm 13 and I know that I'm totally ready to have sex. I no that everyone is ready at differant ages and all my friends are surprised becuse half of them cant even talk about puberty without blushing. It's not like I'm seeing anyone so I'm not being pressured I'm just so ready and I want the first time over and done with. Is this such a big deal?

I don't think I'm going through puberty. But I'm 14 and my penis is tiny. Is this normal? It's about one or two inches long.

I'm a 13 year old girl and HATE being a GIRL. I have the mind strength hands feet and hairiness of a boy but still have the body of a girl complete with boobs. Is there something wrong with me wanting to be a boy?

I saw this statement that one of the sexperts named Heather had replied back to a question, and I was wondering how it could be true the statement was the following:

A woman being a virgin -- if, by that, we mean has not engaged in any kind of vaginal sex before -- doesn't necessarily make any difference in the size of the opening since intercourse/vaginal sex doesn't permanently change the genitals in any way.

The last part is what I don't get, I dont understand, I've had sex roughly 20 times, and I can DEFINALLY see a diffrence from when I was a virgin, my whole genitals have expanded and are loose and there's A LOT of room up in my vagina now, before I could only get a finger if that much. AND also there are claims that people who've had alot of sex are more loose, compared to people who haven't had as much sex are more tight. So, to me this statement is VERY confusing cause to me it is very untrue considering my whole downstairs is permently changed. Please Help!