Finally a scientific answer to one of the world's oldest questions.Why do dogs smell each other's butts? Most people know that it's "how they introduce themselves" but, why is it that way? What exactly are they smelling for?

We can now rest easy, as the science behind the sniff is explained. Bonus Points: You get to hear the phrase, "His team of researchers examined the anal secretions of dogs." I'm glad someone besides me signed up for that job.