“Do radioactive cats have eighteen half-lives?”

“If toast always lands butter-side down, and cats always land on their feet, what happens if you strap toast on the back of a cat and drop it?”

“Curiosity killed the cat, but for a while I was a suspect.”

“What happens if you get scared half to death twice?”

“If Barbie is so popular, why do you have to buy her friends?”

“If man evolved from monkeys and apes, why do we still have monkeys and apes?”

“I have a map of the United States... Actual size. It says, 'Scale: 1 mile = 1 mile.' I spent last summer folding it. I hardly ever unroll it. People ask me where I live, and I say, 'E6.”