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 sailor goes to a cementary
A sailor, while bringing flowers to a cemetery, noticed
an old Chinese man placing a bowl of rice on a nearby
grave. The sailor walked up to the man and asked, "When
do you expect your friend to come up and eat the rice?"

The old Chinese man replied with a smile, "Same time
your friend comes up to smell the flowers."