I would go as far as to say,that if a man in prison for years, gets head or gives head or even worse gets fukked or fukks another man, he is also a homosexual. I don't buy it ,that these guys 'adapt', you either find men attractive or you don't .There is no grey area. So the guys in the op's post are both homos, same also goes for the 'gangsters' who claim they rape men as a kind of 'punishment' for not paying a debt, snitching etc etc. You got hard over another mans ass, that means you are a homo.
I believe a small minority (in terms of world population) men and women are born with an attraction to the same gender, it is basically a genetic defect in my opinion, that doesn't mean gays should be put in prison like in the past, or put in mental hospitals,but it shouldn't be seen as normal .
Now where there is a grey area and I will always argue this, are trannies, ,due to modern surgery ,hormone treatment, I don't believe men who partake in fukking a tranny, like the ones in porn or escorts Iam not talking about the buffalo bill types,men in wigs etc etc, are gay. In my view men who do this, are not gay or even BI, what they have is a fetish for women with penis's. maybe it's a submission thing for some,maybe they love giving a woman anal and trannies fulfil that. As anal can be with some women a problem.