I feel weakness in my knees every time i masturbate , and i usually masturbate once a month or even less , but I am concerned about my knee pains , I have also done a
vitamin D course of 6 months , I wanted to know weather masturbation is the cause of my knee pains or something else like eating habits , I drink a lot of colas , which I am trying to control .
(I am 20 years old )