If there were even a whiff of truthfulness to this answer, one would expect to find a greater incidence of homosexuality among the male children of single mothers – and there isn’t. Or one would expect dramatic numbers of homosexual sons in the (many) families with uncaring fathers – and there aren’t. It would be nice if we could avoid making up facts to fit our political or religious beliefs. As for the original question, just because one’s brothers are gay doesn’t make you gay. You know what you are, I presume.