Well that's one theory. On the other hand, a narcotic substance that tampers with brain chemistry might cause psychosis in some people. Here's another example.
T.B. I've never tried cocaine. I think I might have tried it once and got nothing out of it. Just snorted a little bit. And I just don't mess with it. It's too expensive. And I suppose if I was on the streets and had enough of it, I might get into it.But I'm strictly a marijuana man. All I do is... I love to smoke reefer. And I haven't, uh, never have tried anything but reefer. And valiums. And of course, alcohol.