"Homosexuality is a choice" and its paradox

[Bad Writer]

Agreed, which is why rather than hearing about how unnatural it is, I'd rather hear arguments about why homosexuality is immoral, preferably without recourse to religion at all. "God says so," isn't a great argument in a supposedly secular government, after all; is there even a single non-religiously motivated argument for denying this right?

I think you could argue that the privilege of accepting your parents' investment in you (i.e. by making you) gives you some moral obligation to match that investment with one of your own. Hearing, "Ewww girls are icky" isn't very encouraging for parents hoping for grandchildren.

So when a father molests his children, do they have a moral obligation to this behavior?