Lemme lay this on thick--most won't go for it. I've slept with ~50 girls in the last decade, mostly American, white, fit (idk if that makes a difference). The bottom line: 8 of them actually went through with it. 4 were actually into it. So that 40% BS is off the table.
I think the reasons for her eemed really eager to do whatever to please their man (the first girl I ever had anal sex with said that "i was just listening for your breathing to see if you liked it." Ohparticipation are the big thing. Of the four that did it without really being into it, all of them s, high school.) BTW ladies, this is a guaranteed way to F up a relationship.
Of the other four that were into it:
1. was really, really christian. You will see this more than you think. She was opposed to violating the laws of god by f'ing out of wedlock, so sodomy was apparently the next best option (I said she was really christian, not really pragmatic). On the other hand, she usually got us started because I'm not a pushy lover, and she at one point said it made her feel like a "real woman." This situation is best described in Spanish as "Que el Fucko?"
2. my old roommate (whom I was under the impression was a lesbian) got me super drunk so she could f*** me and decided to try it without asking. Not cool. Ladies--don't do it drunk if alcohol gives you bubble guts. And don't expect a guy to be into it. I know plenty of guys that can't understand how I've ever even done it once. I call this, "the experimenter."
3. the girl that didn't want a relationship but needed rough sex ("call me a whore... la de da de da"--again, not all guys want to degrade you, either). She wanted ATM and things of this nature, so I call her paradigm "the female bottom."
4. finally, and this was the woman that I think most enjoyed it, really did love it, there was the girl that just loved it. she trusted me to get behind her and really go at it, but I could trust her to be doing it for all the right reasons. I could feel that trust around me, not all squeezy. She not only liked the stimulation, she was also really into the after-party (polite way to say creampie anyone?). I found out that semen is full of endorphines and hormones that apparently lower rates of depression and suicide in women that have unprotected sex in general. I think that this same effect through the lower intestine is probably much faster and obvious. So I call her the "junkie." Not because she turned out to have a between the toes problem, but also because she needed me to empty out in her back-side multiple times per day. We talked not too long ago--she is clean with the Horse but apparently picked up a ton of p*rn regarding this other addiction. :-P
Long story short, most girls don't like anal. But if you listen and observe, you can probably make a reasonable guess from across the room without asking and looking like a perv.