Hey guys. I have a question. Whenever my girlfriend and I have sex, she tends to orgasm very quickly. We always do foreplay to get us both relaxed and in the mood. I usually will do full-body caressing and work my way down to her clit, and rub it a little. She's very clitoral, so this makes her go wild. However, once we get to penetration, she tends to cum very quickly, like within a few minutes. I know she wants to last a bit longer so we can do more things during sex. She says that the reason she cums so fast is because between me rubbing her clit during foreplay, and the size of my cock (8 inches long, 6 inches in girth) she can't help it. This would be fine and more of a confidence booster if it weren't for the fact that she doesn't like to have multiple orgasms, as she says that her pussy hurts too much after one orgasm to keep going at all. We've tried, and it always ends up with her yelling in pain and telling me to stop. What can I do to help her last longer or be able to keep going after an orgasm?