Tell him to wear a condom AND masturbate before he comes to see you. There are also supposed to be some techniques that help men learn to control themselves (you can research this online), but I think they have to be very motivated to learn, and to be honest, if he isn't very interested in giving you pleasure, I'm not sure how much success he will have.
Also, I think you should let him know (in as nice a way as possible) that you expect to enjoy sex, too. Too many women give up the orgasm in the interest of not hurting his feelings, and they never end up with satisfactory sex lives.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?