When a person self-stimulates the genitals for the purpose of achieving sexual arousal and pleasure, normally to the point of orgasm (sexual climax), it is called masturbation. The man usually touches, strokes or massages the penis until he achieves orgasm. The habit of masturbation is common in young men. They have different reasons behind doing these. When the genital is in an unhygienic state, there is a deposit of smegma in the pit of glans leading to sexual excitement in several cases. It ultimately leads to masturbation. According to sexologist doctors, if there are frequent masturbation and ejaculation, it stimulates parasympathetic nervous functions. There can be an overproduction of sex hormones and neurotransmitters such as dopamine, serotonin and acetylcholine as a result of this habit. You can lose your sexual stamina in middle age if you indulge in excessive masturbation. There are various other harmful effects of masturbation such as problem in erection, premature ejaculation, low sperm count, etc. Therefore, proper treatment by a sexual medicine doctor is necessary.