sometimes when you warn people about things they can think to themselves, 'it won't happen to me, if it does it's fate'. Until they are suffering from it they probably won't identify with it unless they know someone with cancer. Seductive advertising makes people aware of the immediate effects/benefits of using sun cream which offers greater incentive to start now rather than something that might or might not happen one day in the distant future when they are alot older. Even if it is death, look at how many people continue to smoke.