It's a mix of morbid (obesity) curiosity  towards how these people can genuinly be so disgusting that we need to share it when we find something so unbelievable that we need to prove it, that and it's real good fun to rip on fatties who deserve it by just existing. Now you should probably reconsider the six pints of ice cream this image made you want to buy for your weekly snacks and swap them out for some fruit.