Some people have a compulsive problem with sexual stimulation (ie, constant one night stands, excessive pornography/masturbation, dangerous behaviors around prostitution). What kinds of childhoods did these people have? Was authoritarian religiosity common among them? What kinds of attachment styles (certainly not secure ones)? Why sexual addiction instead of, say, heroin? (Lots of things can activate the old dopamine pathway.) What kinds of personalities might these people have? What's the difference between healthy and unhealthy sexuality, and how is this defined across different cultural and political perspectives?