Because they would crack each other up.
In France, one egg is *un oeuf*
By the egg on its face.
Because they crack themselves up!
A: You crack it up.
How do you fit 20 Cubans in a shoebox? Tell them it floats!
You don't need to, they'll tell you
You've gotta be kitten me. You can SPEAK?!?
Because he was Snowd en! (according to my friends this joke has been around for awhile, but I hadn't seen it yet, and wanted to share the goof)