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.
There was this guy at a bar, just looking at his drink. He stays like that for half of an hour.
A man went to the doctor complaining of insomnia.
A married man was having an affair with his secretary. One day, their passions overcame them and they took off for her house, where they made passionate love all afternoon.