Some men are "wired" gay... they are way more attracted to men than women from the get go...
I think nearly every other male has the capacity, built in, for 'becoming' more gay.
They are born 'wired' to respond to women, but can learn to become responsive to men, or to become more responsive to men.
I think indulging or being compelled, as in my case, to have homosexual experience can awaken and increase that capacity.
Had I never had a homosexual experience... I would probably self identify as 100% straight....
The fact that I had homosexual experiences at a very young age, and that I found them pleasurable, has made me far more responsive to homosexual imagery and fantasy than I would otherwise have been.
Its like this... Are you "born" kinky?
Before you ever saw bondage... or images of women in thigh high boots... or what have you... were those ideas floating around in your head?
As you TRY kinky things... and find you like them, you tend to fantasize more about kinky things... and about things even more kinky...
Exotic flavors spoil the palate for the ordinary tastes.
Men in prison who are compelled to homosexual sex, seldom "become" gay...
They simply learn that it can feel real good... every bit as physically satisfying as sex with a woman.
Have they become more gay?
Or have they simply become less narrow minded about pleasure?
If by gay you mean coming to prefer men... no I don't think that's what happens.
If by gay you mean becoming able to be turned on by homosexual imagery.. by the thought of sex with a man? then yes... that can absolutely be learned.
But the most important question is would that be something you categorize as "bad"?
I think anything that widens your horizons of understanding, compassion, and acceptance is a good thing.
I honestly believe that any man who ever, willingly, tries sucking a cock, will find that he likes sucking a cock.
Maybe not as much as he likes eating pussy... but find that he likes it just fine.
That can not help but make you less homophobic... more accepting of gay men.
In that sense.... I think that every man should and can learn to be more familiar with their own innate capacity to simply enjoy pleasure.
Becoming more comfortable with a perfectly natural interest that abides in every one of us.