1. Hate the smell of weed and cigarettes 2. Don't like mind altering substances much 3. Smoking anything plus running plus martial arts means you're gonna have a bad time 4. I've seen a lot of people start off doing it not very often then suddenly they're doing more, then everyday. 5. Can't stand stoners, they seem like really weak people of they must be high all the time 6. Engineering plus weed usually equals prison, but at the very least you're getting fired 7. I try to minimize the amount of crap in my system, alcohol included. Mostly because I already am on Aderral and anti-depressants