They're just the right things to do, period.
Not because anyone thinks they're right. (Many people spend much of their lives trying to finesse them away.) Not because you get a good feeling from doing them. Not because God says they're right, and not because you just decided they're right. Not because you get benefits from them, or suffer no losses, because sometimes that's the case, but often it isn't.
Yes! Exactly. People who need a "God" to tell them right from wrong are not moral, they are just assholes.