Expert Q & A Answers About pelvic nerve

Why can I only orgasm with anal sex? Are vaginal orgasms possible?

My boyfriend and I have started exploring anal sex...and it seems that I can only climax through anal sex. Any ideas why this might be? I don't know if this has anything to do with it, but in my previous relationship my partner was performing oral on me and bit my clitoris. It seemed to decrease feeling for a while...could that be the reason?