I have (had) a friend who participated in a couple of "DP" video shoots, with him on the bottom. it was a group double vaginal (when one pair of guys was done, another replaced them, and so forth). The problem was, as he related it, nobody was supposed to cum until the last pair of guys was done, and then they were all supposed to finish on her face. Unfortunately, when my friend was inside her, the guy on top (HUGE according to my friend) and the sensation of his big dick pressing and rubbing against my friend's cock, caused him my friend to cum inside the girl they were fucking.
Nobody noticed, apparently (gotta wonder what the guy who followed him thought, as he slipped his cock inside and found it ...gooier than usual), and while the group of guys was standing around, pulling their puds in preparation for the final facial, the guy who'd shared the chick's pussy with him leaned over and said something to the effect of "look at all these fuckin' queers", which my friend found extremely ironic - "dude - you just fucked my cock until I came, and THOSE GUYS are the queers"?