It's part mental, part physical. The physical aspects is that it feels 'soooooo gooooood!' that he can't hold out. The mental aspect is that you turn him on! He needs to learn to not 'mentally picture' what he doing while he's doing it. He might try to think of something that isn't pretty. You might be able to get him to last longer by jacking him off first if he can go twice. The 2nd time should last longer. If not, jack him off but don't allow him to ejaculate. That should help de-sensitize his penis so that he can last longer.

The funny thing about climax is that when u r really tryin hard to reach climax, u can't. And when u r not tryin to get premature ejaculation, u come too quickly. Its all psychoclogical.
The best thing to do is to do what porn stars do. Think of something totally unsexual while having intercourse. That delays the climax.

What position are you and the boyfriend typically in when he is climaxing? Personally, I can go like the energizer bunny in missionary or the doggie style, or even woman-on-top facing forward, but will not last much more than 2 or three minutes in the lotus position or reverse cowgirl.

Change it up...Find a position that doesn't afford him as much feeling, and allow yourself to get close to orgasm before changing to something more stimulating to him.

Also, the suggestions of helping him masturbate will help, but don't let it become a habit...Try other stuff first. If you feel he is close (and by that, I mean you can feel the penis swelling considerably)...Stop! Change positions...Slowly. For most guys, once we're excited and about to cum, if you move into a new position which makes us withdraw and penetrate a few seconds later, the majority of the stimulation is done...Like starting with a clean slate.

We have tried the masterbating thing and that doesn't help cause he goes fast on the second time to. We do so many positions it's hard to keep track. He cums in whatever postion we're in. We've tried pills too.....Don't work....The climax control condoms are working pretty good he just says it burns and sometimes it goes so numb that he goes limp, but that's only if we go at it twice a day. It is a mental problem cause he always tells me I turn him on so much he can't hold it. I'll tell him to think unsexual next time.....Thanks everyone.....More advice is good too! Yeah!