Asklemmy

I'm sure you would hear more than a few say something along the lines of 1) ending their life can be done relatively humanely. And it serves a fundamental purpose, for sustenance. While meat for sustenance is not actually necessary, it is considered a basic staple of our diets and generally acceptable. 2) Having sex with animals, though, harms them in a way and leaves them to live with that harm. It can traumatize the animal. It is inherently inhumane. And it serves no purpose but to satisfy a carnal desire, a morbid curiosity, or a sadistic appetite.

I'm not saying that it is an altogether consistent or sound argument. It is something some can rationalize though. But, frankly, I would call either explanation at least a little bit bullshit.

The answer to either their desire for meat or their revulsion to animal molestation is that their instincts give them those feelings. It is evolution. Animal meats and fats are a calorie dense and nutritionally valuable food source that our ancestors have eaten since before humans existed, and we're mostly wired to enjoy the taste and crave it. A revulsion for sex outside of species helps make sure that we continue to make babies. It's as simple as that.

Some very few people don't have one, the other or both of these instincts, but the vast majority do. Most of those people will happily rationalize the feeling that isn't based in rationality, like above. Some will examine those feelings and rationalize themselves into changing/recontextualizing their feelings or choosing to not act upon them in light of their viewpoint or some virtue they've applied to the question. But most just do what feels right and is normalized and don't ever really truly question it.

And even if you are one of those people who has rationalized themselves into a rationally/morally superior position regarding meat eating, or maybe you never even had an instinctual desire for it, you almost certainly have other habits, values, opinions, etc. that go against every rationality too that just come with human nature.

We're people. We're animals. We have intelligence. We have primal drives. Nobody is morally perfect. Nobody can even agree on what moral perfection is. Morality is both subjective on the whole, and objective for each and every one of us. We just gotta get along.