I worked for years with abused men. Yes boys grew up.

What you should be aware of is this is nothing new, the only thing new is boys/men tell (and are easier believed as girls/women who are always to blame).

Victims are a certain type of people. If they like it or not they will stay a victim till the moment they change (your son found the solution... Be agressive).

A strong will and way of standing, walking, talking is needed to be not attractive to certain men (catholic church played a big role in abusement and still does, same within very religious societies).

Besides of this, females can be abusive too, or give a hand!