The whole dopamine "addiction" issue is fascinating... there's an entire department of developers over at Facebook whose jobs are classified as "retention specialists" and all they do is figure out how to make the next page any given person looks at just a little more alluring.

Another variable might be looking at adult violence vis-a-vis the classic "marshmallow test:" Does the ability to postpone gratification make you a less violent person?

Fascinating stuff!

=^..^=