If you've got religious nutcases yelling at you to behave 'as God intended', it's an obvious response to point out that God made you gay! :) Not a 'forgive me this sin' but 'this is perfectly normal, shut up'.

True, and I'm quite happy to reference Biological Exuberance when people attempts to claim homosexuality as 'unnatural'.

But I think the proper nuance there is not "homosexuality is natural, so by your own criteria it's actually okay", but rather "your criteria are silly and lead to conclusions you don't even agree with yourself, so let's try some different criteria... like mine."

(I am not a big fan of the argument from nature, in case it wasn't obvious.)