Hello- Excessive and abusive masturbation damages the various subcutaneous tissues of penis, causing both a buildup of plaque and an increase in scar tissue, two issues seen in a similar condition known as Peyronie’s Disease. And because the sexually exhausted body experiences an inhibited liver production and a depletion of HGH, an essential growth hormone for penile tissues, a male will experience penis shrinkage. Fortunately, medicines and oils repairs the damaged tissue of penis thus making them hard and strong during erection. Oil massage with proper techniques recovers shrinkage completely.