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."

40th Birthday
A middle-aged guy is out to dinner with his wife to celebrate her 40th birthday. He says, "So what would you like, Sherry? A Jaguar? A sable coat? A diamond necklace?"

She said, "I want a divorce."

He replied in shock, "I wasn't planning on spending that much."