Well, if he doesn't understand it, he sounds like he hasn't had a lot of experience. Either that or your body elicits a physiological response from him and you should both see a licensed physician as to why. A couple of pointers. Men usually build endurance with time/age. Endurance, that is, a tolerance for the sex act that prevents premature ejaculation. Ejaculation usually comes from intense stimulation and for the unprepared and underexperienced, any stimulation is pretty intense. If you would like to have him "slow down" there are products available at your local adult store. The thing that most comes to mind is product used in pornography alot, which is numbing cream. After your male partner is erect, the cream can numb sensation without stifling blood flow. This reduces stimulation and allows for a longer sex act, at least until the cream wears off. Additionally, you might try using more lubrication in order to offset the stimulation from friction during coitus.

First thing you need to know is this: Guys aren't as smart as you think! You need to let him know that there's no blue ribbon for cumming first. Here's the deal... your guy is going to like it whether it's any good for you or not, he's good for one cum; 5 minutes or 45 minutes he gets one cum. I personally like it to last an hour and give out lots of orgasms; I put the girl first; it's all about her. Technique: If I feel like a cum is comming, I can push in all the way and rotate, stimulating the opening to your vagina and your clit. If I raise your legs till your knees are at your shoulders and do what I just told you, your clit is in better contact with my pelvic bone. Also, by doing that the head of my dick is more stationary and that's where 90% of the feeling is, so that way I can control "when I cum!". Here's a key point though... you have to tell him!!! Not confrontational, but just trying to help him to help you. If he doesn't care if you have an orgasm or not... he's just in it for "a warm wet place to put it", and any ol' gal will do. If you think I can help you with this, and I've worked real hard to be good at sex, then email me. I'll try... hey I had a girl have 20 orgasms in one 1 1/4th hour screw. (and she said she had never had an orgasm during sex before) Good luck!