I'm older than 40 and look pretty good but I totally get what you're saying.  In the past, it took a long, steady gorging process to climb to that weight.  If someone was that fucking fat, you could safely assume that person was middle aged.  Things are so terrible now that kids have destroyed their bodies before they can legally drink.  That is the body of a 45-year-old woman who gained 50 pounds with her first pregnancy, 75 with her second and 100 with her third, who sat on the couch and ate a diet of fast food and frozen pizza for decades.  There is nothing young about that body.