i suspect that religious prohibitions significantly reduce the amount of westerners who are poly, so it kinda follows from the atheism part.
I don't actually agree with that too much. It's more a rationalism thing than an atheism or irreligious thing.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread went to over 800 comments in two and a half weeks, so I think it's time for a new one.