Just decided this would be pretty fun, and you know, if it works, you're going to have a lot less trouble later on. I'll start:
Are you Russel's Teapot? Because you are out of sight!
One of the jokes/goth pick-up lines that is still my favorite is:
"Nice boots. Wanna fuck?"
I suppose this could be altered for atheist uses. Suggestions as for altering?
"Nice genes. Wanna fuck?"
"Does that 'A' on your shirt mean you're an atheist? Or is it a quality grade?
Either way, I approve."
I may not believe in god, but I believe you're the most beautiful woman here.
I may not put much weight into that particular compliment, but I'll give it to you:
It sure is original and well stated ! :)
Hmmmmm, variation on that which just came to me.
You know, it's not a sin, if you're not despoiling some pure, Christian girl ... and for me, nothing is a sin. We should make this work in our favor.
(Men, try this:)
I don't believe in a god, but you, you look like a goddess.