Hi let's keep this simple , masturbating is not harmful what so ever , its normal & healthy & fun , You can stop anytime you wish to , why not just trying cutting down , you will benefit from that if you do , please take care ,
M is a natural habit. Suppression of natural urge does not work. You may convert this energy in mental energy by circulating sexual urge or your awareness around microcosmic orbit. Google to learn the microcosmic orbit.It is applicable to male and female.
Learn abdominal breathing. when sexually aroused, do this breathing. This will help to control the urge in a positive manner.