I have had some homosexual sex act desires, but it's not due to being attracted to men; it's a conditioned response to being lonely and starved of affection, which was only resolved when I was with the older male who treated me like his girlfriend, way back when I was a boy; having sex with him was pretty much the only time anyone ever touched me without hitting me. While I have the desire to be penetrated, it doesn't actually feel good, and I don't enjoy it when it's happening; and I find the scent of a men's locker room, rift with male pheromones, both nauseating and repulsive. I'm sure the psychologists would have a field day with all the maybe's and what if's, but I've been through all of that already. Sometimes a cigar is just a cigar.
If you're not sure who you're attracted to, just go down to the beach. When a hot guy is coming from one direction, and a hot girl is coming from the other direction, which way did you find yourself looking? It's a rare person indeed, who's head will be twitching back and forth like a metronome.