Well some say its a funny joke and I must admit not too many jokes actually make me laugh. However when i was told this one it really did make me chuckle.
What is the difference between a Hippo and a Zippo?
One is a Big heavy Mammal, and the other is a little Lighter.
Ahhh come on, I bet that made the corners of your mouth turn up, even if only a little bit :)
