[Antoninus]

What do you mean by "biologically natural"? It occurs within biological life forms in nature, therefore it is natural. Or are you using a different definition of "natural" than the commonly accepted one?

So does cr@pping on a public sidewalk and eating your own vomit, but I certainly wouldn't argue that doing such things is "natural" for a human being.

[Dimensio]

So does cr@pping on a public sidewalk and eating your own vomit, but I certainly wouldn't argue that doing such things is "natural" for a human being.

It is natural. It's certainly neither normal nor acceptable, but it is still natural -- unless you use a different definition of "natural" than the one that I use.

A personal relationship with Jesus Christ is not "natural", as it involves elements that are not part of the natural universe, but that doesn't mean that there is anything wrong with such a relationship. Natural is not a synonym for "good", it's merely a descriptor for events within the universe, and it has been horribly misused as an excuse to apply labels of morality and immorality. Whether a thing is natural has no bearing on whether or not it is acceptable or desirable.