An idle worshiper.
A person who stays up all night wondering whether or not there is a dog.
Project Manager is a person who believes that 9 women can deliver a baby in one month.
Thought of this one on my own while playing WoW a couple days ago and I'm pretty sure it hasn't been told before. I like corny jokes. I Googled it and didn't find anything (:
Because religions don't like competing with an invisible power that actually works.