Lots of people masturbate! Even if they don't talk about it, it's common for people of any gender or age to do it. Even before puberty, children sometimes discover.
Guys can get hung up on whether they masturbate too much. But it's not how many times you masturbate in a week (or day) that really matters.
Masturbation is completely normal and extremely common. People of all ages masturbate and it's often the first sexual experience they have.