hello there. indulging in too much masturbation can be harmful. but 2-3 times in a day wouldn't necessarily cause a problem. if you are so concerned about this, then stop doing it so often. go to a doctor and tell him your problem, he would write and give you a sperm test which is include sperm count and sperm microscopy. eat healthy include greens and fruits in your diet, and you'll be fine. regards, Dr Anil Jain