I think the correct thing would be to say that every cuckold who sucks a cock or gets fucked in the ass is at least a little bi, but I don't think that those bulls who receive blowjobs or fuck the girl's husband are bi, less gay, they are just getting the pleasure they would get from any hole or a sex toy.
Just ask yourself, which is more likely after the bull gets blowjob by the cuck or fucks him, that the cuk takes the pleasure of sucking cock in private and getting fucked in private? Or that the bull is fucking guys after something like that? I think the answer is obvious, normally we cucks take a liking to it, for bulls it is just a fun experience and sometimes a bit uncomfortable
In my experience after sucking a bull's cock I like to do it from time to time with a guy in private, but the 2 bulls that have fucked me have always done it as a mechanical and masturbatory act, it was not about them fucking me, just cum
I hear what you're saying, but I'm not attracted to men at all. Much like you're describing, for me it's not about wanting sex with men, it's that I get off on doing things outside my normal comfort zone in the name of serving my wife. The taboo element plays into it as well. But even after crossing some of those boundaries in certain scenarios, I'm still not sexually attracted to men or specifically seeking out physical contact with men outside playtime with my wife.
I'm not claiming it wasn't a turn-on in the moment, and lots of people don't distinguish between "****** bi" and submissive play, and bisexuality. So I don't care if people want to call me bi. But I certainly don't think I'm "more bi" than a bull in that case. A bull might be situationally ok with sticking his dick in my mouth, to turn my wife on or assert dominance or whatever, and would never do that without her present. I do it for the same reasons, except for me it's to be submissive and for him it's to be dominant. It doesn't go outside of the bdsm/kink scenario with hotwife present for either one of us.