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."

Busted Doc!
A woman was having a medical problem - her husband snoring.
So she called the doctor one morning, and asked him if there was anything he could do to relieve her "suffering."

"Well, there is one operation I can perform that will cure your husband, but it is really rather expensive. It will cost $1000 down, and payments of $450 for 24 months, plus payments for extras."

"My goodness!" the woman exclaimed, "sounds like leasing a new sports car!"

"Humm," the doctor murmured, "too obvious, huh?"