Atheists who announce "I'm good without god"

[GrandizerII]

How do you get an ought from an is?

Yeah, the "is-ought problem" again. You can look up Google for the various non-theistic solutions proposed.

But as far as I'm concerned, if beating your wife is wrong, then you shouldn't really do it, unless you somehow like to do things that you believe are wrong (such as hurting your poor wife).

If you have good reasons, then feel free to present them.

If you beat your wife, you're causing harm to someone who never consented to you harming her. There's nothing good about being a wife-beater.

If that's not a good reason, then you tell me what is a good reason that beating your wife is wrong. Remember you admitted that God is not needed, so there must be some reason that has nothing to do with the divine. And if God is the only reason, that's not much of a reason at all because "God decreed" doesn't do much of a job explaining why something is right/wrong.