1The boy who couldn't lose weight He is just 18 years old, but Jonathon Wallace has been told he has just years rather than decades to live. And for Jonathan, it is all because he can't stop eating. He weighs more than 190kg's. Having struggled with bullying and a feeling of isolation for years he has made the decision to have invasive stomach by-pass surgery. But as Jonathan reveals to 20/20, the surgery will prove no quick fix. His mother still insists on cooking and providing all the wrong foods and with a resistance to exercise, he will have to literally fight for his life.