Masturbation can't be categorized as good one or bad one.I am now 17 and I masturbate wgen I watch sex movies.This my request to you that when you masturbate you sperm comes out along with liquid but a person who does it for 3 to 4 times a day is very dangerous it may not effect you now but when have your real sex you will be worrying that I shouldn't have done that.i am not telling you to stop it totally atleast divert you mindfor two weeks your mind diverts you to sleep and It will be wet on your panties.so please take this to your mind.