Thanks for the detailed reply.
Well, from what you have mentioned just now, it seems your son is suffering from Obsessive compulsive disorder ( OCD) , and the reason i cite for this diagnosis is that , it is not necessary for an OCD patient to have compulsive rituals like counting several times , or checking on locks over and over again, etc , but also if a person like your son who gives too much attention in being perfectly organised and too much time in minute details such as , investing too much time in planning to sleep due to all the lenthy duties he performs ,which may look normal to a third person, but the importance he attaches to each one of them like asking you whether you signed his planner or not, keeping a glass of water just in case the need arises, telling good nights several times, etc is beyond imagination of others , and if there is any sort of disuption in such routine tasks of his , he surely will feel uncomfortable , so all these characteristics also define an OCD DIAGNOSIS.
And i must commend you on your foresight that you had taken the necessary precautions to prevent any sort of mishap, as it is quite possible that in future his obsessional thought of inserting his finger into the socket may just overwhelme his logic and reasoning and he gives in to perform the compulsive ritual and hurt himself.
So, i suggest that you consult a psychiatrist and get him thoroughly evaluated and get him placed him on antidepressants such as paxil (paroxetine) or prozac( fluoxetine) , as they are the drugs of choice in OCD , which is a type of Anxiety disorder . Also , along with the drugs , it will be better if you also get him started on Psychotherapy ( counseling) , which is offered by a psychiatrist or a clinical psychologist , and the best psychotherapy for OCD is Cognitive behavioural therapy ( CBT) , WHICH IS A SHORT COURSE THERAPY .
Well, i would advice you to do the needful ,as early as possible , as since he is young boy , so if he is started on the therapy and drugs early then we can groom him in such a way that his OCD will not have a baring on his future .
I wish your son the best of health.
I hope my answer serves your query according to your satisfation.