Straight porn doesn absolutely nothing for me.
Okay, I lie, sometimes straight porn does a little. But never anything like the gay stuff. The men in these movies are at least twice as attractive as their straight counterparts, plus there are at least twice as many of them. A minimum of four times the fun!
Mostly of course, it's a part of me I don't share, but it can lead to funny situations. Like the time I went to meet a friend of K's in a gay bar and pointed to the monitor showing porn, saying "I know that one!"
On another occasion I met with a group of six (girl) friends at a hotel in Chicago for a weekend and played them a Falcon (NSFW) movie. These women were all very interested in the idea of gay sex (talking about it, reading slash fiction, even writing some) but as it turned out much less comfortable with seeing the mechanics of it.
Perhaps I really am a gay man at heart. A horny one - or is that pleonastic? If you want to stalk me, just promise to send me some DVDs and I'll happily tell you where I live!
EDIT: Perhaps I should mention that my family is pretty tolerant as far as soft core straight porn is concerned. When I was in my mid teens there was a station here in The Netherlands which screened an Emanuelle or Emanuelle-like movie every Thursday (I think) night.
My father would watch this while my Mom and I were in the room, Mom ironing or doing some other chore (she doesn't have the patience to watch any movie) and me reading and watching at the same time.