First of all, this forum needs a gay board. Second, you know how some people like roller coasters, but don't realize it? They're getting strapped in to that thing, and they'd rather pay taxes than ride that blasted hellspawn. But, when the ride is actually over, they're laughing their asses off. Could that possibly apply to bisexuality? Could someone think that having sex with another guy (or girl, if you're a girl) is the most disgusting thing in the world, but when they're actually doing it, on a dare, suddenly, it's actually pretty hot! Do you think that might be possible?
I personally think everyone to a degree is bisexual. But that is just my own personal belief so no need to shout out about how you are 100000000% straight or something. I can't really see someone having sex on a dare unless they are pretty fucked up (drunk or high) or just promiscuous. I shouldn't think that way I suppose. Eh. I guess it could happen. Are you speaking of a personal experience? ;]
There are a slew of other reasons a person might have gay sex without wanting it. Prison rape. You live in Rhode Island (where unofficial prostitution is legal; just whorehouses are illegal) and being offered a lot of money that you desperately need. Some people will do almost anything on a dare. Ever heard of a bakla? http://laurganism.com/2005/09/22/bakla-the-filipino-gay/