Weed, man.

[douglas1999]

Having been a huge pot smoking sack of shit for several years, the thing about smoking potent weed all day every day is that you develop an impenetrably high tolerance to thc. So ironically, the people who smoke constantly are barely high at all, whereas if you only smoke once in a while, you will likely get obliterated from one small puff. There *is* legitimate evidence that smoking any amount during formative teenage years as your brain is still physically developing can lead to a variety of psychological issues, but it's still relatively uncommon.