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 housewife, an accountant
A housewife, an accountant and a lawyer were asked ''How much is 2 plus 2?''

The housewife replies: ''Four!''

The accountant says: ''I think it's either 3 or 4. Let me run those figures through my spreadsheet one more time.''

The lawyer pulls the drapes, dims the lights and asks in a hushed voice, ''How much do you want it to be?''