Anal Lover Does Without

I am 34, married for 6 years. I went through an early slutty phase, a lesbian or bi phase in college, then settled in for a bit with a few guys I slept with over a few years, admittedly at times I was dating 2 or 3 guys during the same period but everyone knew we weren't exclusive. But I put away my slutty ways when I met a guy who didn't want me to date (read sleep with) anyone else. He was the first one I think who cared enough to ask me to be exclusive. It's been 6 years, we have a great life, we both have high paying jobs, and we have one child. No cheating, sharing our fantasies etc. we have a very active sex life. One that is a bit bad for me though.

I let the second boy I ever had sex with have anal with me and I liked it. After a few times I was having really good orgasms everytime from anal, and only sometimes from vaginal, sometimes from oral on me. Now with my husband I cum every time we have sex, and he is better at going down on me than the girls I was with in college over 3 years. But he thinks anal sex is dirty, he doesn't want to do it, says it's unnatural and shouldn't be done.

I'm at a loss, I don't know what to do. I want to get it up my backside sometimes, I really like it. I've even asked him to use my vibrator on me back there and he does it sometimes, but it's not the same.