I am 66 years old and masturbate since my 9th Age regularly ie every day. (For many years I have regularly 3 times a day masturbating.) That's 57 years. During this time I had masturbated about 27 001 times. Even now when I masturbate on average 1,9-times per week. Therefore I have the exact figures because I've run out of interest in a sexual diary. Take a look at the link time, I am Mr.Z.
http://www2.hu-berlin.de/sexology/GESUND/ARCHIV/MAY_99.HTM
I once tried (out of interest) to get along without masturbation at the age of 23 years, 21 days, I have endured, it was hell.
About addict sexual behavior, there is an interesting link.
http://www.aerztegesundheit.de/sex1.htm
Incidentally Health impairments I have never found today. So do not worry.
I masturbate even better than I've GV.