researchers. charity cancer research u.k. put up an ad in the undergrad in london warning that obesity after smoking is a leading preventable cause of cancer and for that bit of health advocacy, the charity is being denounced not for bad science and baby engaging in that, who knows, but for something called fat shaming, one of those in answers his psychologist bethany marshall and she joins us tonight. things a lot for coming on. i am not the kind of person who would attack people for their weight. i'm not that interested. i struggle with cheeseburgers myself so i'm not judging. they also think that scientists ought to be allowed to present the conclusions they reach without being attacked by interest groups and you seem like one of the interest groups. >> on the other hand, first of all, this is good science. he said you weren't sure about the science. there's a link between cancer and obesity. the problem is the body shaming and the blaming. if they want to blame, i have no problem with blame. why don't they blame manufacturers of sugary soda drinks?