Humans are conditional fuckers. We're part of an elite group sexually stimulating others primarily for pleasure (and status, among other things, but frequently not primarily to procreate), and have the added benefit of (almost always) not being cannibalized by our mates upon dismount. We also incentivize sex like no other animal -- a dog probably won't ever give the value of a top-of-the-line HDTV to another dog in exchange for a blowjob, and probably not even shelter (or maybe -- Idunno much about "unspoken lease agreements" with dogs). Disincentives for unproductive sex also exist... chopping off the heads of barren wives, cultural shame, "forever alone"...
Without Imperial Japan or the Nazis, we'll probably never know, but I'd be willing to wager the vast majority (90-99%) of all humans are bisexual and express only a sexual
preference which they'd be willing to break under certain conditions. I'd also be willing to wager that most self-declared homosexuals can become consenting bisexuals in the right environment and under the right circumstances. I don't want to have sex with other men right now, but for a hundred-thousand dollars - sure, it can't be
that bad. I mean - God's arbitrary as fuck, right? -So let's say you have a Christian who dies, goes to Saint Peter, and Peter produces a document signed by both God and Jesus stating that all applicants accepted for the interview must give Saint Peter a blowjob prior to entry... Well, what the Hell does the guy do? He always spoke for God and Jesus, quipping "Eve, not Steve," but now it turns out his interpretation was wrong. Hell and you get to continue insisting you're straight, or Heaven with family (... which also gave Peter a blowjob, I guess). ... Well jeez, then I guess the decision's a good bit more complex... what if you think your family refused to give Saint Peter a blowjob? -Or you could be in Hell disguised as Heaven -- once you introduce magic shit, anything's possible... maybe Satan gets his jollies by posing as Saint Peter and demanding blowjobs from righteous, straight men. -Or maybe it's a test. I don't think God ever said something and wanted the individual to do the opposite, but maybe he's feeling a bit zany today, and you don't want to mess with Zany Jesus.... give yuh a cabbage face or somethin'...
Uhhhh... anyway - I'd be surprised if the vast majority of humans would never consent to having sex with... anything, really, for the right incentives and in the right environment -- plastic dolls, horses, holes in the ground, geyser holes, bagels, 105-year-old women with uncovered eye sockets, Hillary Clinton, cucumbers, car exhaust pipes... o.O
Though, I wonder how many self-declared straight men would have sex with Hillary Clinton before a gay man...