WHAT'S THE DEAL with all this butt sex?

So, when my female friends ask me sex questions a la: "Why do guys ALWAYS like/want to such-and-such?", often my answer comes back to porn. Meme theory gives us a great way to think about how ideas and thoughts transmit from person to person through society over time. So take that as the starting point for what I'm about to say. If you're unfamiliar with meme theory, then get on wikipedia already. Jeez.

So, let me just make a full disclosure up front: I used to be REALLY INTO Catherine MacKinnon. What she said just made a lot of sense to me. Minus her claim that p0rn is (literally) rape, which I don't think anybody takes seriously. Anyway, I'm mostly over her now (thankfully), but some of what she said still resonates with me. Namely, the idea of porn as an instrument of speech makes a lot of sense to me.

So, my basic thought is that since guys use p0rn as their wanking fantasies, what they see on the screen will come to influence the sorts of things they will want to do in their actual life, since the point of fantasies is that you want to act them out. MacKinnon actually cites a lot of anecdotal evidence suggesting this is true; her point is to claim that it's a dangerous trend for women, who are often injured attempting to replicate the exotic sex acts their husbands see professionals enact on film.

(Remember, meme theory!)

Now, my only evidence that more (straight) people to-day are going for drives on the Hershey Highway than in days gone by is anecdotal. And of course anecdotal evidence means nothing; however, I'm pretty confident that if there is some kind of survey out there on this topic, it would show a difference in anal sex habits between people to-day and people, say, in Kinsey's surveys.

If this is true, then my theory is that porn is at least partially responsible for causing this trend. I think that's also true for lots of other kinds of sexual behaviour, such as the so-called "money $hot", tit fucking, group sex, etc.

What do you think? Are more people buttfucking these days? And why?