Hi, Sperm are regularly produced in our body along with fluids secreted from glands like prostate seminal vesicle etc it becomes semen . So if it is produced regularly it should be discharged regularly from body by sexual intercourse and manually through masturbation otherwise it comes out during nightfall . Now masturbation does not causes weakness or defect in sexual organ ( energy lost is almost similar to doing other activity in muscle contraction n relaxation) . It give pleasure durin act of masturbation and later calmness which is thought as weakness . Your height and weight are normal. So in my opinion you don t require to supplement any diet if you are taking balanced diet . Hope this will help.For any queries feel free to ask. THANKS N REGARDS