I honestly dont see any real, beneficial reason for doing drugs except for people who are in serious, medical pain(and even that is controversial itself).

and I've seen what drugs can do to people. I've lost all of my childhood friends to them and saw it consume them over the years into horrible people so I'd rather not try to destroy myself(not saying that doing drugs will automatically kill your personality, but it does change you). That and it smells....well....repugnant