Little Billy ran up to his mom shouting "I figured it out! Obama is an alien!"

Little Billy ran up to his mom shouting "I figured it out! Obama is an alien!"

Mom asked him, "What do you mean?"

"Well, Dad says that these aliens called 'grays' are trying to take over the world."

"OK dear, and how does that have to do with the president?"

"Mom, don't you know? His dad is black and his mom is white. That makes him gray!"