yeahwriters:

“A linguistics professor was lecturing to his 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.’”

(Found this here.)

Hello.  Have I mentioned I am a huge nerd??