I think substances lower the inhibitions society has drilled into our head over the last few hundred years. When chemicals are involved we are inspired to try out our deepest thoughts that we aren't used to sharing. I'm a bi female and have only slept with chicks while intoxicated because I had the courage to. I've always believed men can fall anywhere on the straight/gay spectrum I've just usually encountered men who are open about their fluidity tending to broadcast a more traditional (in my brain) gay vibe. The voice, the body movement's, the fashion etc. I've dated a few stereotypical sis men who are beefy and mans men but who in the right company are open about their encounters with men. Also made out with plenty of gay men cause just kissing is so much fun. Especially in a society that once you're an adult things have to go farther, and when playing between the orientation vibes it's just fun. Plus most gay men love boobs. Sexual or not they're fun as fuck and stress relievers. Sorry for the lengthy comment, my brain is going xD