I appreciate your insight and I'm not trying to rip on male bi-sexuality or claim it absolutely can't exist. I'm just saying that in my experience, every male kid that I knew growing up who identified as "bisexual" now just identifies as gay. Obviously not saying that must be the case in your situation, but I'm saying that in all the cases I've personally known, it's probably more an issue of a gay youth not yet ready to accept his sexuality. Take perfect examples like Freddy Mercury, or better, Elton John. Both began in (supposedly) committed relationships with women, I believe both were initially married to women, both identified as straight; later, as part of the coming out process, both identified as bisexual; and in the end they just admitted they were gay. I remember watching an interview with Elton John back in the less-tolerant 90s, where the interviewer asked him if, considering that he'd been married to a woman previously, he identified as being bisexual; his answer was no, he's gay and always has been gay.
I do think females are quite different and more capable of maintaining actual, meaningful, emotional relationships with the same sex. Perfect example, one of my female cousins, who's actually the prettiest girl in our family. Seriously, she could've been a teen model in Japan. She's been married to both a man and a woman (and now another man). Even when we were young, she'd have pretty serious, years-long relationships with both sexes, and not just for the purpose of enraging the family. She's what I would consider to be an actual bisexual...although in all fairness I'd say she's 10% bisexual and 90% gold-digging opportunist bitch. Then I have another female cousin who, in our 20s, was in a decade-long relationship with a woman; she then broke up with that woman, married a guy, had a kid with him, but ended up divorcing him a few years later. Would I consider her bisexual? Absolutely not. She's a lesbian who gave in to pressure from an extremely conservative family to do what was expected of her in order to ensure her name remains on an eight-figure trust fund.
And then on the other end of the spectrum would be simple kinks. As many around here know, over the past few years, when left to my own devices with a little alone time and lots of alcohol, I routinely end up having a spank marathon with ladyboy videos. Now, unlike you, I haven't had spontaneous desires to "suck a dick," as you put it, but I suppose with enough Costco vodka and a guarantee from Miran that she wouldn't blow in my mouth, I probably wouldn't complain too excessively if it appeared on the menu. But that's just me, I know myself, I get bored easily and new kinks keep life interesting. By this time next year I might be paying girls to piss or shit on me. I really just don't know.
But I will say this: if you genuinely do get your rocks off with both females and males, then good for you. I've always said that if I could derive as much pleasure from fucking guys as I do fucking girls, life would be so much easier since guys will fuck nearly anything, anytime and anywhere (and I do consider myself reasonably attractive). But in recent years, even most girls aren't insanely interesting anymore. And that's when I start hearing Miran calling from Pornhub and then it's all downhill from there.