Wow, good to see that fellow forum posters feel so passionately about DP and alleged homosexuality
Different strokes for different folks I guess. My opinion is that there's nothing inherently homosexual or bisexual about two cocks touching each other occasionally (as I wrote in a previous post, imagine a hot girl sucking your and another guy's cock at the same time). In case of double vag or double anal I think that the pleasure is the result of performing an outrageous and taboo sexual act with a woman who is willing to be penetrated by two guys at the same time. Basically the same as with DP, just that DPP or DAP are widely regarded even more outrageous. But in my view the sexual pleasure is directed towards the woman. You could argue that it's bi, and it may well be, but not necessarily so.
I guess that you will say that even if the actors in a DPP or DAP aren't gay or bi, seeing two cocks rub against each other still evokes an impression of homosexuality in you. Right?!