It's weird because bisexual women are like whatever, oh you had sex with a man and then a woman? Alright I don't care, you feel more straight to me than gay.
But something about a man who has "enjoyed another guys cum"... even if he's saying that to a woman he's trying to have sex with... nigga you gay
You're correct.
In sexual psychology, the male is the generative power and the female is the receptive power. Everyone kind of intuitively understands that you need the masculine to make capital "S" Sex happen—you need a potent, transformative, solar power. Have "lesbians" figured out a workaround? Maybe, but nobody really believes them.
In the functional, heterosexual man, there's basically a video-game camera trick going on: from the sun's perspective, the moon is autonomously luminous. In other words, straight men find women attractive because the semen—that is, the man's own—is
implied. A woman without implied semen is an incomplete circuit. It's not something that the man consciously thinks about, and it's dangerous if he does; if you give the sun a mirror, the moon will look a lot less bright in his eyes.
Male semen enjoyers have untied a mental knot that they were never meant to—they've introduced the ouroboros to its tail.
It's possible to "reset" to heterosexuality, but a seed-fiend is like an alcoholic: if he's been sober for a long time, he's gonna crave that first bud-light (a woman) like nothing else; after that, though, it's straight to the Everclear (men's semen).
This is why bisexual men are gay, and they're arguably gayer than gays for two reasons: first, the women are playing a losing game—he might be at the straight water-level before she jumps in with him, but by doing so she displaces the water and raises it to the gay water-mark; second, the bisexual—unlike the true-blue gay—still has hot, red, heterosexual blood in his veins, and frequently still
chooses men despite women being an option.