But if it's a mechanism of our bodies, while it might be "objective" in the sense that it's a physical thing, it's still relative to each human. Just like someone is born tall or bow-legged, one might be born with 'wires' that make them uncomfortable with different things. If they act accordingly, are they moral? Even if what they do makes most others uncomfortable?

Anyway, I think the author of the article linked in the root comment is looking for something more divine for moral values, but as a disappointment, just repeats the same rituals of thousand year old fallacies like as if theist believes have objective basis from which other objective basis can be inferred.