I've noticed the same thing. They parody themselves. All we need to do is get the timing and angle of the photo right. I have some thus-far-unshared photos (I'll get around to it someday) of fats who practically mock themselves.  I did miss out on the 2 potentially greatest photos. One was of a fat man sitting on the front of an old-fashioned barber's chair (the armrests prevented him from fitting in it), and the chair had "Beauty Queens Only" written on it. The other was of a gargantuan woman, easily 600+ pounds, at a buffet.