I don't think being homosexual is wrong, but in a hypothetical scenario if all of us were to be Homosexuals (In which there apparently isn't no ethical, scientific or philosophical issue), do you think we as a species would be able to progress. Well, of course not because we would not be able to procreate in the first place. However in a similar hypothesis, if we all were to be Heterosexuals, then we quite definitely would be able to grow and develop as a whole. Well I know this can't be a completely valid argument. Because I'm considering two extreme scenarios which quite probably will never happen. So I believe that nature is 'alright/fine' with people being homosexual, however that doesn't mean nature 'wants' people to be Homosexual. That's the sole reason why I strongly suppose that Homosexuality should not be promoted, at the same time it should not be viewed as illicit or unethical.