The appearance of food in television and in commercials is something that triggers people to eat when they aren't hungry. I've observed this scenario hundreds of times in friends and aquaintences when I was much younger.  People see a burger on TV, next thing you know someone wants that burger and others who are in the room go along to the fast food place and come back with food even if they have been snacking all afternoon. It is even worse if they are under the influence of marijuana but even when marijuana is removed from the equation, people are more likely to eat because of seeing food in the media that they consume.