Shooting blanks?

My boyfriend and I think that he is shooting blanks, we have had sex ever since the beginning of janurary of this year (2006) and we have NEVER used a condom, and it cant be me cause he didn't use condoms with his other 2 girlfriends that he was serious with. is there a way to get that to stop? cuase he doesn't want to go to the doctor and if the case is him shooting blanks I was just wondering if there is a way that maybe to get rid of that or maybe ya cant I dunno. but help would be nice :P

The best thing for him to do to get a straight and 100% answer is to see his doctor. I now guys are stubborn when it comes to seeing a doctor about their private bits, but if he wants to no tell him to stop guessing and suck it up and go to the doctor so he can put the issue to rest and find out what his options are. He needs medical advice!