Courtesy Bad Science Jokes:
A guy goes to a psychiatrist.
“Doc, I keep having these alternating, recurring dreams. First I’m a teepee; then I’m a wigwam; then I’m a teepee; then I’m a wigwam. It’s driving me crazy. What’s wrong with me?“
The doctor replies:
“It’s very simple. You’re two tents.”
Heh. Also, this caused me to Google the difference between a wigwam and a teepee, so I learned something today, so that's good.