Why Did The Chicken Cross The Road?
Why did the chicken cross the road halfway? She wanted to lay it on the line.  Why did the unwashed chicken cross the road twice? Because he was a dirty double crosser.  Why did the chicken cross the Mobius strip? The stay on the same side  Why did the chicken cross the basketball court? He heard the referee calling fowls  Why Did The Chicken Cross The Playground? To get to the other slide.  Why did the rooster cross the road? To cockadoodle dooo something  Why did the rubber chicken cross the road? She wanted to stretch her legs.  What do you call a chicken crossing the road? Poultry in motion.  Why didn't the chicken skeleton cross the road? Because he didn't have enough guts  Why didn't the chicken skeleton cross the road? Because he didn't have enough guts  Why did the chewing gum cross the road? Because it was stuck to the chicken.

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."