Unhealthy lifestyle = cumulative effects. You don't get a heart attack from one big mac but you can need decades of life support from one outing on a motorbike

Unhealthy lifestyle = cumulative effects. You don't get a heart attack from one big mac but you can need decades of life support from one outing on a motorbike without helmet. To make it worse, people who don't wear a helmet aren't the best riders either and thus more likely to be involved in an accident.