The threads on the Cause of Homosexuality and Is Homosexuality Necessary got me thinking. That was a mistake! As Im a closeted bi-, have often wondered if unlike the guys that profess to being 100% one way or the other, if other bi-guy have had life-altering events that initially triggered their switches. Knowing that bi-sexuality is rampant in the animal kingdom, what triggers our release to have sex with both genders? In my case, it was getting shit-faced drunk with two varsity swim teams members my freshman year in college; one of which had been assigned as my big brother by the coach the first week of practice. Throughout H.S., once practice was over, I generally hit the showers with the other guys and to the best of my knowledge had never in the least been attracted to another guy, even my three best friends. We horsed around in the showers, talked of eating pussy, easy lays, etc. and did a lot of butt slapping with towels but never anything else. On occasion we might tease another guy if he got a boner, but that was about it. College showers with the rest of the team my freshman year wasnt much different. I continued to date several girls and actually got very lucky with a couple. All that changed, the night of our teams party. Following dinner, awards, and a lot of other crap, I went back to my big brothers apartment with him, his roommate and a couple of other guys. We drank, watched some straight porn, did some more drinking, etc. Dont really remember much else except waking up the following morning with my clothes in pile by the sofa and no one else in the room. Needing to take a piss, I walked into the his bedroom to find him fucking his roommate. Honestly, I wanted to gag and get the hell out of the place. I was intent of running out of the apt. house and down the street with my clothes and shoes in-hand, thinking is this a nightmare? Stopping me at the door, the two of them had other ideas. Apparently, in my drunken stupor, Id engaged in sex with both of them. For more than a decade, Ive tried to figure out what, besides alcohol, triggered the bi-sexual beast in me to be released that night and later that morning, only that time willingly. Yes, I admired my big brother and had sought his advice on a number of things, but certainly my feelings didnt approach infatuation. Yes, their times were better than mine, they both looked better in their Speedos than most of the other guys, but physically Id never been attracted to either of them. Id been at practice with both of them, in the weight room, the showers, and hadnt even thought about having sex with anyone else on the team. For months, after that, I had a really hard time dealing with my sexuality and would have denied being gay or bi-. Skipping the sordid details of my life in the intervening years between then and now, my questions are really for other guys that profess to being bi-sexual. Can you trace your switch to a single experience? Was your realization, overnight? Aside from having the usual guy-commitment problems, are your actions purely physical? And by that I mean in the absence of love, infatuation or whatever the hell, you want to call it. Or, are your actions, basically animalistic in nature, with getting off much like a release valve? Am relatively new to this site, but after reading a lot of threads, I really think that those of us that are bi- and distinctly different than being 100% gay or straight.