I know plenty of people who lack imagination who I believe never did drugs (I don't know for sure of course) so I can't call it proof.

It is very common for the addicted to ignore obvious signs of their addictions and the downsides thereof so it probably is a sign, but it isn't enough to be proof. (I'm thinking of an alcoholic who "had a bad ice cube" and now won't drink their whisky with ice)

Both replies were kind of jokes from my side. Regardless, whether I have or don't have brain damage is... Up for debate. Probably not significant. And I do appreciate my memories of wildness quite fondly. I'm sure other people have other ways of getting their fix for adventure, some more constructive than others. Regardless, we all have different needs and different itches to scratch and I think some people might need a certain amount of risk more than others. And that's fine in my book.