Any time you feel dumb, don't worry. Check out the following excerpts from a "Wall Street Journal" article by Jim Carlton. Lots of people are dumber than you.
Use of the word "beautiful".
A man and his wife are in the shower together when the doorbell rings. The wife puts on a robe and goes down to answer the door.
This concerns a question in a physics degree exam at the University of Copenhagen: "Describe how to determine the height of a skyscraper with a barometer."
A shepherd was herding his flock in a remote pasture when suddenly a brand-new BMW advanced out of a dust cloud towards him.