ShellyGale,
I have read your tendency to look towards 'outside substances' to explain the perpetrator's behaviour and lack of self-control, and while we can't rule this out and I would be happily proven incorrect, I think it is somewhat misguided. I would agree with you that the CSK is an addict - to dopamine. He is a serial sexual offender with offences which have started at a relatively young age, which means that as he was becoming sexualised (as an adolescent, or possibly even younger) he was relating to sex through a set of increasingly 'deviant' or distorted thoughts and fantasies. Over this period of time his neural pathways for sexual arousal and gratification would have become increasingly consolidated such that it would require exposure to increasingly strong and extreme sexual stimuli (mental, visual, physical) to achieve the same amount of dopamine release and arousal, hence the escalation in sexual offences. This would mean engaging in increasingly violent behaviours and taking greater risks. My point being that there does not need to be an additional substance to fuel his behaviour; his neurological wiring and brain's neurochemical thirst for dopamine release, and the influence and active indulgence in his thoughts and fantasies around sex and control more than explain this. To echo the thoughts of others, an introverted, emotionally avoidant, control-oriented and organised individual would not likely be a 'throw caution to the wind' risk taker, rather, it would more likely be that he would savour all aspects of the minutiae of his MO as his fantasies build towards enaction. Given this, while he might have ceased physical offences, without significant therapeutic and behaviour change intervention intervention it is unlikely that his neurological wiring and tastes sexual stimuli have changed much, and we would anticipate he has addiction to extreme *advertiser censored* only available on the dark web where he could access that type of content, possibly engage in 'like-minded' social networks, maybe even mutually brag about past achievements to relive the excitement and fuel further fantasies.