izzie over a year ago the other day we had sex ed @ skool n i dint wanna ask but how old should u be be4 you masterbate plz reply asap %-) ? %-) Loading... cuckoohead24345 over a year ago there is no age but usually people start masturbating at the age of 12 Reply Loading... Guest over a year ago You should masterbate when you feel like you need to don't be scared have fun :) Reply Loading...