This is not a meme of everything natural being allowed but a meme countering bigots claiming homosexuality is unnatural which they take as the reason to not want it allowed (because they've already lost on the angle of it being ethically wrong). Just because something is natural, doesn't mean it's good. It just means it's not unnatural and you're somehow confusing the two. What's good is an ethical and altogether different question.

Or in simpler terms: Bigots be bigots (homosexuality is evil) > we prove them wrong > they still be bigots and move goal posts (homosexuality is unnatural) > we for some reason indulge them and prove them wrong on the moved goal post > they move goal posts again claiming to have already forgotten that we've already long established that homosexuality isn't ethically wrong, looking insane in the process > I wonder why i even talk to you and block you because every single time i see a comment of yours it's some negative bigoted shit and I'm tired of engaging with you. You manage to make yourself look insane all on your own anyways