A lecture about English
A linguistics professor was lecturing to his English class one day. "In English," he said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."

A voice from the back of the room piped up, "Yeah, right."

A Bee at a Bar Mitzvah
A hungry bee meets a fellow bee who directs the hungry one
to a Bar Mitzvah. The hungry bee eats his fill, then again
meets his friend.

The second bee asks how it went, and hears that his friend
ate plenty. The second bee then asks why the first bee is
wearing a yarmulke (the small round cap that religious Jews
often wear).

The first bee replies, "It was a Bar Mitzvah. I didn't want
anyone to think I was a WASP."