As you were, Gay is NATURAL because it naturally occurs.
That's like claiming it's perfectly normal for everyone to be born with Alzheimer's because it naturally occurs. That isn't normal and just because it happened naturally doesn't change that fact.
According to your arbitrary and subjective definition of normality.
He refuses to accept that body parts have functions because that leads to the belief of a greater being. What he has failed to acknowledge is that people didn't make the heart beat or the lungs expand. We only observed them doing so. We didn't create the heart or what it does, nor can we think really really hard and have it change to something else. Nor can we keep flapping our arms and hope to fly, hold our breath and live underwater or anything else that our body can't support.
Lol, what a ridiculous rebuttle. I doesn't do crap to affect my argument. For one thing, all I ever said is that every organ merely has a list of possible functions, and that which one we view as primary is entirely subjective to our end goal for the organ and the environment we are in. Since flight is not a possible use of human arms, this is hardly a valid counterpoint.
Furthermore, I completely acknowledged the affects of evolution. That's kinda the point. Natural selection chooses in favor (or against) certain variables in specific circumstances. That doesn't mean that there's an objective truth about the function of an organ created by natural selection--the past doesn't matter. Say someone makes a hammer, with the intention of using it to knock in nails. He'd be inclined to call that its purpose. But if a murderer began using it, he definitely wouldn't consider that its primary focus anymore.
It's no different with organs.
The bottom line is that body parts serves a purpose regardless if it came from evolution, a higher being or created from man.
And the purposes served are completely and totally subjective, and should not be turned to for objective backing.