There are various ideas about how you should or could look your best. Diet and exercise of course, grooming probably, dressing well and so on. But technology has moved on from all of those simple things: there's so much more that medicine can do for us now.
For example, it's entirely possible to get fat in places where alomst no amount of exercise will get it off: and we'd have to be on a starvation diet to get rid of it that way.
That's why things like Liposuction are becoming so much more popular. Of course, it's not just to look good either: losing that weight can make you healthier as well.
Hey, technology marches on so why limit it just to the gadgets we buy? Why not use the advances in plastic and medical technology to better ourselves?