Fool,
No, that's not the point.
It is the point...that you are trying to evade.
First, there are people who for whatever reason are unable to whistle. They just never learn, don't have the skill, whatever. Whistling is NOT a primary function of the oral cavity. So...bad example on your part.
I didn't say it was a primary function. I asked if it was inherently disordered.
Second, the topic here is sex.
Right. I'm probing the use of the term "inherently disordered" by your side. I asked if everything we do has to come back to some biological function, and you said yes. And then you challenged me to come up with a counterexample, of which whistling is one. And now you're flailing around trying to explain how it's not also considered a sin to whistle.
So...just because a penis can be inserted into a mouth does not mean mouth = alternative vagina.
We're not dealing with equations here. Obviously, there are important differences between oral sex, anal sex, and P in V sex. That's why people, and not just gay people, have each of those different forms of contact. What your side needs to justify is a purposeful interpretation of the body that would positively forbid its use in several of these ways without contradicting yourself or reaching an absurd conclusion like that whistling is inherently disordered.
That's the point you're and your pals here are trying to make about both mouth and anus, but simple anatomy and physiology refute you. Always has, always will.
There's no one here who is confused about the role that genitals play in the perpetuation of the species. What is being rejected is this notion that we're all somehow, at least in matters of sex, slaves to your notions of the purposes of a human body.
Go back to his question earlier: Will you go on record and state that nature intended the species-propagating penis be inserted into the waste-disposing rectum, just as it is intended to be inserted into the vagina? As far as human sexuality goes, are the two openings absolutely equal? Yes or no.
Nature doesn't intend. It's a nonsense-question.