Sometimes when I smoke, I get this subtle but noticeable aching in my nuts, usually just my left lol. Sometimes I feel it in more of the groin area as well (again, usually left side). My cousin had something like this during summer but it seemed more major and after a few doctor's visits it was gone. I've googled this and seen a lot of similar posts but could never pinpoint an explanation or reasoning behind it. I know multiple studies have shown a link between marijuana and testicular cancer, but does anyone know why this happens to some guys?