to start your husband's skin condition usually is a toxic liver needing to be either cleansed or flushed. the psoriasis is a symptom of another problem-stupid doctors only treat symptoms, and by their license are not allowed to heal real problems. taking your son to a "professional" will be a diagnosis of "some condition" treated by drugs, which are NOT a solution, another band-aid masked as therapy.
you likely know what your son needs/wants and are afraid to give it? even if i am wrong, all of life is recognizing what form everything exists in. it is all love, and seeing it is the trick. the universe is made from light, you and i, wood, metal, glass, cloth, human, all resonating at varying frequencies to give things the form that they posses. a single light wave is half positive and half negative. it is likely he sees events, people, feelings as ONE sided, and is repressing the other half. it is possible he does not feel loved by his dad, and is acting out-common for drug addicts and alcoholics, possible. you may try helping him with the sex part-take him to a place where he can get relief or experience?
what is he expressing that you and your husband are repressing? all relationships work that way, to help us love the parts of ourselves we are currently disowning. what i found in my life to confront myself on things that were "not working". was to do the opposite of what i'd ever done prior. if you want something different in life, usually you must do something different. Dr. Mike