This week, we're listening back to a discussion of taboo sexual practices, and whether they're really as unusual as we think. Psychologist and author Jesse Bering talks about his book, "Perv: The Sexual Deviant in All of Us." And we'll speak to Nicole Prause, Principal Investigator at UCLA's Sexual Psychophysiology and Affective Neuroscience (SPAN) Laboratory, on her neurological perspective that raises doubts about self-reported sex addiction.