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."

After the fall in Garden of Eden...
After the fall in Garden of Eden, Adam was walking with his sons Cain and Abel. They passed by the ruins of the Garden of Eden. One of the boys asked, "What's that?" Adam replied, "Boys, that's where your mother ate us out of house and home."