Oh yeah you can change your sexuality, for sure. Try heroin. You can do that shit sober on purpose just because you want to. Literally transger attraction to pussy onto attraction to dick with smell, sound, and color associations (jerk off to and fuck pussy under a heavy red light in an otherwise dark room, apply the same red light to a man's asshole, and consent to be changed. Transfer a uniquely pleasant candle (or latex, KY) and erotic music of your liking in the same way)_