Answer:
Why is everyone tired on the first of April?
What do you call it when a dinosaur farts?
How far will a blind dog walk into a forest?
Has its teeth on your head but doesn't bite
Some are clean and some are dirty, but all are meant to get a chuckle. Most like it, some takes offense from it.
I build up castles. I tear down mountains. I make some men blind. I help others to see.