I love it when people try to use their putrid magic books to say that they have a strong basis for their morality and ethical outlook. Of course its mostly these same people who don’t actually read the bible to see what it actually says. For your pleasure and edification a handy infographic on Christian Marriage.
So, when religious people ask me, as an atheist, on where I get my morality from I can happily say, not from the same place *you* do. Mill, Kant are good places to start for rational moral thinking, finish with Lakoff and Singer. :)