I have been lucky in the anal arena. Every partner I have had, except one, has enjoyed anal sex with me. My wife's favorite position is to be DPed with her laying face to face with a buddy in her puss as I penetrate her ass with long slow strokes. A slow passionate DP make my wife hyper-orgasmic.
I had a girl friend in college that had a very difficult time taking my large cock in her puss. I could only penetrate enough to get my cock head in. After she talked with some of her friends, that I had previously screwed, she decided to try their advice and try anal sex with me. The first time took a ton of tube, foreplay, and time but she loved it and was hooked. For the rest of that school year we had anal sex at least daily, often multiple times in a day.
The girlfriend that turned me on to group sex in college also loved anal sex. She would start climax as soon as I started to penetrate her anus and would not stop until I withdraw my cock. We once did a gang bang with her, myself and four other guys. The five of us guys did her ass & DPed her repeatedly for a few hours. She would have one orgasm after another until she passed out from exhaustion. When she woke up she would do it all over again. It was an incredible weekend.
So there are women that love anal. I have been lucky, I have know a lot of them. I think being a swinger and hanging out with other couples that swing I have been exposed to a higher percentage of women that like anal than probably exists in the general public. But as with any type of sex if your partner does not know what they are doing it may not be as enjoyable as it could be.