1. You’ll save two lives instead of one.
2. One kitten can become lonely.
3. One kitten can just drive an older cat nuts.
4. Two kittens will “self-train.”
5. They help each other burn off energy.
6. Fewer behavior problems with two kittens.
7. Curiosity overcomes “food finickyness.”
8. They act as pillows for one another.
9. Having two kittens is insanely fun.
10. They will each have a friend for life.

Read the full article at Reasons why 2 Kittens are Better Than 1 from the Cats Guide at About.com