You've always struggled to gain weight, no matter how much you eat or how little you exercise, so you've come to my clinic today to get some fattening plastic surgery. You're only about 300 pounds, bordering on malnourished, so I suggest adding 200 pounds across your body to bring you up to a healthy 500. I use a special machine to temporarily inflate your body so you can get a preview of what you'll look like all fattened up, all the while complimenting you on how good the extra weight looks on you. I like to imagine this in a fat future type setting, where people are getting surgeries to expand their stomachs and inject themselves with fat, rather than cutting it out. New beauty standards and all.