Do you have any memories that you cannot let go of? That play back in your head incessantly every single day without fail? That obsess nearly every waking moment? For addicts, that memory is the dopamine release of being high, and it definitely can happen after a single use. It doesn’t impress everyone in the same way, but for those who are vulnerable to it, it becomes nearly the only thought they can have until they scratch that itch. I used to think just like you, but after dealing with and truly understanding addiction in people close to me, I can never support legalization of certain super-addictive drugs. There is no one deserving of the torment that addicts are cursed with. We should try to ensure less people, not more, are ever introduced to it.