I really doubt that 10 or 12 times a month could affect either your mental health or your memory adversely. I am a young American woman in Tennessee and have masturbated frequently since I was about 8 years old (my third year of elementary school.) I am 27 years old and married now. I have lots of sex but I still masturbate quite a lot. I am a school teacher and I think that if my mental state was compromised I would not have passed the background check. Incidentally, my husband also masturbates a lot and we like to do it together sometimes.