

You can probably do it with adult material and replace those faces. It will most likely work on models specific trained like the person you selected.
People have also put dots on people’s clothing to trick the brain into thinking their are naked, you can probably fill those dots in with the correct body parts if you have a good enough model.
There is also a difference between somebody harassing somebody with nude pictures (either real or not) than somebody jerking off to them at home. It does become a problem when an adult masturbated to pictures of children, but children to children. Let’s be honest, they will do it anyway.