Does masturbating cause moobs?

Hi im 17 years old and ive been masturbating since i was 13. Im in a healthy weight range and ive been doing a lot of chest exercises, cardio and dieting for the past year. nothing seems to be working ive lost a of weight in the excercises and dieting ive been doing but my moobs seem to not go. the chest excercises i do are pull ups bench press push ups and incline presses. i was just wondering if masturbating was causing my moobs because ive asked my doctor why i have them and she said its a hormonal thing.