 I would also say to take it easy on him. There's nothing wrong with this kink or fetish, and I instead think you should work on trying to get comfortable in your own skin. How do you know that it's porn induced? I'd recommend you go to a real therapist to talk this through as I see someone that's inherently insecure in his own self and his sexual life. Does porn or masturbation have any other effects you perceive as negative other than a feeling of shame over your fetishes? If not, then I don't see this necessarily as a PMO problem. I think abstination from fetishes and denial just because rest of society perceive them as negative is in the long term more harmful than embracing it, feel that there's no fault with it, and controlling your life from there on forward. 