Bilateral Thinking Puzzles

Q: A man is sitting in bed. He makes a phonecall, says nothing, and then goes to sleep. Why?

A: The man is a travel agent. He had sold someone two tickets for an ocean voyage, one ticket round-trip and one ticket one-way.

Another

This is another thing that seemed funnier a third of the way into writing it, from the Surrealist. 19th August 2005.