Well, either that, or the queer child-molesters got to them, just like it’s always been.
I know there are cases where imprinting has happened, it seems, from a boy being molested and growing up to desire other males for sex.
However, I have some experience with SNAP and many male victims of abuse during their childhood or youth by adult men are perfectly heterosexual, though they might still have issues because someone ruined them when they were so young. But they are not gay, and they do want to be with women.