Related:

• Tie two birds together and though they have four wings, they cannot fly.
• Two silkworms were having a race, but it ended in a tie.
• Chekov: "What are we looking for, sir?" Spock: "Lieutenant.
  .." Valeris: "Two pairs of gravity boots." -- "STVI:TUC", Stardate 9523.8...
• I believe in peace and bashing two bricks together.
• Discretion - putting two and two together and keeping your mouth shut.
• You don't need a computer to put two and two together.
• In Blythe, California, a city ordinance declares that a person must own at least two cows before he can wear cowboy boots in public.