Answer:
Why was the math teacher late to work?
Some are clean and some are dirty, but all are meant to get a chuckle. Most like it, some takes offense from it.
What did the right eyebrow say to the left eyebrow?
What is big and yellow and comes in the morning, to brighten mom's day?
What do you call it when a bird can move things with its mind?
Iβm hard as a rock and as light as a feather. Iβm passed on to one another. Poor people need me and rich people have me.