Ramesh, sexual arousal among growing-up boys is a natural phenomenon due to the testosterone hormones in body. The semen stored in the body need to be ejaculated. Through manual stimulation of the penis whenever aroused, a man can get satisfaction and he can ejaculate. That through self-stimulation or masturbation one’s penis size decreases or penis gets curved or man’s sexual power is reduced – these are all misconceptions and all untrue. The truth is that whenever you are sexually excited and stressed, if you resort to masturbation, your stress would actually reduce and you would get a sense of relief. Masturbation is a normal, healthy thing and it has no disadvantages. Only point you should note that masturbation should be not mechanically, just for the sake of doing it repeateadly - one after another activity. If you resort to that, you are bound to be feeling physically weak.