"As cyber sex has become more and more of a problem, what has shifted for me is the realization that many people who were into cyber sex didn't fit the classic profile of sex addicts," says Patrick Carnes, author of "In the Shadows of the Net: Breaking Free of Compulsive Online Sexual Behavior." He has spent 30 years studying and establishing sex addiction as a field of psychological dysfunction.

"For most people this is not an issue," says John Bancroft, the former director of the Kinsey Institute for Research in Sex, Gender and Reproduction. "But others have always had a problem keeping any kind of sexual stimuli under control and they have never had opportunities to go over the top as they do now."

Captivating title--sums up the problem quite concisely.