Q: why did the atheist cross the road?
A: he thought there might be a street on the other side but he had to test his hypothesis.
Q: how many atheist does it take to change a light bulb?
A: 2. one to change the bulb another to film it so theist can't claim it was an act of god.
Q: how does a rationalist woman get her hair done?
A: in big bangs