Because they can't take it seriousry.
Interactive Joke of the Day Mug
Coffee Mug
Playing pocket pool.
Exoplanets Thought that one up myself.
Two pies to the face and one somewhere in a field in Pennsylvania.
Did you make that Fermi?
He had Jello fever!
You use an o-silly-scope!
Because it can't be used until it's broken!