Cumming daily in age 12 to 16 may harmful for later sexual life? Can it reasonable for 'lack of cum' or 'low production of cum (sperms)' in rest of life???
One wonders how these rumors get started. The body is continuously produceing semen or "cum", which is held in the seminal vesicles until ejaculation occurs usually after sexual stimulation.
There is no reason to believe that daily cumming is harmful in anyway.