I think it's important, even though it's a little awkward.
Is It Normal to Masturbate?
Is it masturbation which cracks my voice or puberty and will it get cured? Try to put yourself in your teenager's shoes and anticipate how they'll feel when you bring this up. There's no reason to punish masturbation, unless you're concerned that a teenager has developed an addictionin which case you should probably seek professional guidance. A great many people, men and woman, masturbate regularly, but it's neither necessary for a happy and well-functioning life, nor a roadblock to that life. It may be one of the most awkward conversations you can have as a parent, but promoting safe and healthy sexual practices in your teenager is part of your responsibility.