We want to get rid of [uncomfortable thoughts and feelings], and the quickest way to get rid of them, unfortunately, is often through some type of substance, so that when a teenager or an adult finds that substance, that gives them the immediate relief from the intolerable thought, memory or whatever they find out it works, then they're almost conditioned- pre-wired, wired, so to speak- to be able to go back to that substance every time they have these uncomfortable thoughts or feelings or memories.