How do you handle a teenager sexually harassing you if you're over 18 years old?

as a hypothetical, since ive never heard of someone dealing with this before.. What do you do in a situation where say, a 13 year old boy sexually harasses/ assaults a woman who is 18 years or older? Can you do anything at all? Or is that something that you can do nothing about?
Asked Sep 16, 2017

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