No, that's drug addiction. As I said before the vanity part provides the incentive to begin - the drug addiction sustains it long after the peer pressure aspect is no longer relevant. I think you underestimate vanity as a driving force, especially when you're posting in a thread about male pattern baldness (which is really only an issue of vanity). Though good diet and regular exercise aren't as popular as medical authorities think they ought to be, think about how much less popular they would be if health was the only incentive. Being thin and fit is strongly correlated with sexual attractiveness all over the world. That is what gets, and what keeps, most people who do make some effort at diet and exercise motivated. Clothing, makeup, plastic surgery, orthodontistry - these things represent billions of dollars in the world's economy. All driven by vanity.