I am taking Finax 1mg twice a day. Is that okay to treat hair loss? Should I reduce dosage or continue?

Your photos, your masturbation habits, grey hair, and wide scalp/forehead has no correlation.  Not sure how you may think they are all realated. 

You can shampoo your hair as many times as you would like. It does not affect genetic balding. If you feel shampooing makes your hair / scalp dry, then shampoo less.

There is no way to explain why you have a small bump on your chin. If you are concerned you should see a doctor for an exam.  The opinions or information on the Internet would be at best guesses and it would not lead to a solution or a treatment.

If you only apply minoxidil in certain places you shouldn't expect hair growth elsewhere (where you are not applying it). This seems logical.

Alopecia areata may be triggered by stress, but stess is not the CAUSE of it.  Follow up with your doctor and explore your treatment options.

There is no permanent cure for genetic male pattern balding. Medications such a Propecia will help.  There are side effects with any medications.  If you are emotionally scared of the side effects, then it may not be something you want to use.  You should explore your emotions...