I realize there's a school of thought -popular among some feminist pornographers- that gangbang and bukkake scenes are also an expression of thinly veiled homosexual fantasies, but I have trouble subscribing to this theory.
Then you're being naive
Don't agree. Liking seeing a hot chick get all slutty in a gangbang or bukkake makes a guy no more gay than Faceblaster starring in them makes him a gay pornstar.
I have no interest in seeing any gay porn, but I do enjoy seeing a slut totally go over the top. That usually involves lots of guys.