The few exes I was sexually active with were into anal sex, and I discovered that I really enjoyed it. I still to this day don't understand why- all I know is that it gets me incredibly hot!
When my husband and I began getting sexually adventurous, I admitted how much I like anal. He'd heard so many stupid gay and anal jokes from his friends that he'd just formed an aversion to it, but after some convincing, he agreed to try it.
He had mixed feelings after the first time, but now, he loves it just as much as I do! It took a bit of learning, because the exes I'd had anal sex with were NOT as well endowed, so we had to do some research (and learned that you should warm-up prior to insertion, to prevent injury).