Hello Thanks for query . Your friend is indulged in masturbation twice a week . Masturbation is a normal act of a human being to get sexual satisfaction without an physical intimacy with a female partner and it is natural for every individual to get into it at the age of adolescence . First of all there is myth in a mind of common man that excessive masturbation is the reason of all sexual problems But I would like to state that it has been discussed in scientific forums all over the world and proved scientifically that masturbation does not have any negative effect on any organ or system in the body . However one should observe that he does not get addicted to it .One can restrict it to twice a week without any harm. Dr.Patil.