It seems like this is becoming more and more of a common problem among men.

Your boyfriend might have tight foreskin and it hurts to pull it back. If he can't pull it back at all, that could be a problem. If he can pull it back about halfway then he can treat it himself. He could stretch his foreskin so it loosens up and maybe you can help by having sex more, as it also helps loosen up foreskin.

we have sex alot, but he cant seem to actually cum when he is inside me, he has to get up and masturbate to actually be able to finish. i have no idea what the problem is. but i think having more sex wont help much.