He said: “Now there’s another thing: I had some morphine I was experimenting with and somebody stole it, about twenty grains.” “Experimenting how?” “Taking it. I wanted to study the effects.” “And how’d you like them?” I asked. “Oh, I didn’t expect to like it. I just wanted to know about it. I don’t like things that dull my mind. That’s why I don’t very often drink, or even smoke. I want to try cocaine, though, because that’s supposed to sharpen the brain, isn’t it? 

― Dashiell Hammett, The Thin Man