Orgasms!!

OK so I've been having sex with my one and only for about 8 years now and I have NEVER had an orgasm from our intercourse. He has given me plenty by playing with my client or eating me out but NEVER by fingerings or intercourse. The sex is wonderful.....(most of the time) and he doesn't for a whole lot of for play (he's a slow learner when it comes to women's bodies) but I desperately want to know what an internal orgasm due to intercourse feels like. I mean I'm almost 25, I already had a baby and I've been married to my one and only for almost 6 years! Please help!