dear PS, it is sad that we have our child come down with an illness like OCD, because we feel guilty that it's our own fault, and with your son who is a 'perfectionist and double checks' means that he does have OCD by doing these habits, and even by procrastinating is also included with this disease.
Even though we try and learn all about OCD what it means, what it does and perhaps ways of trying to cope with it ourselves means an awful lot mainly to the person learning, but to the person who has it could mean nothing to them, unless it's done by trying to understand and accept that your son has to do it.
My eldest son has had it for a long time, just as I have, and often he would say 'sorry dad I have to do this', but I could never ask him not to, because I knew that this illness he had to go through doing it.
Unfortunately he wouldn't take any medication, but he seems to have settled down a bit by getting married, whereas I take a SSRI medication for both my serotonin deficiency and OCD, for myself and that just means it may change for other people, however to answer whether I have lowered my habits/rituals is something I can't answer, but I do know that perhaps I have benefited from this medication, or is it because I've had it for 56 years and learnt how to hide it and therefore do habits naturally without worrying about doing them now.
Being a single Dad of two sons in their late 30's we all hope and wish that everything goes well for them, don't get any major sickness, nor struggle in life, but there are times when it's out of our control.
It would be interesting for you keep a diary on how your son progress's, and I certainly hope that he does improve so that his adult life doesn't have to suffer one bit. Geoff.