Now that you're on it your kids don't think Facebook is cool anymore. But just because teen girls are burned out on Facebook does that mean the social network's going away?

Pop culture Professor Bob Thompson is skeptical.

"I don't think we have the sense that once grandma is on Facebook all the kids are gonna sever their ties to it."

Professor Thompson says if not Facebook, something like it might always be around.

"It may not be Facebook ten years from now; it may be some new social media application or service we haven't even heard of yet."

However, Professor Thompson says we once called our kids the 'Myspace Generation' and that certainly went away quickly.