Why is Dr. Pimple Popper a hit? The psychology behind the gross videos

The dermatologist's graphic videos showing acne-zapping and other skin procedures have countless fans. What's the attraction?

"Gross sells, plain and simple," says Dr. Adam Friedman, Professor of Dermatology, in response to Dr. Pimple Popper's large fan following. Dr. Friedman elaborates further on why we're drawn to things that are, "a little bit gross," but also why Dr. Pimple Popper potentially undermines the value of Dermatologists.