I knew a guy like that, he had the body of an Olympian and was married to a fatty. It turned out he was an ex-fatty and while he was making his life better, she was sitting on the couch pounding Twinkies and increasing her gravitational pull. But here's the real kicker, once he got trim and fit, she could no longer handle his newly formed physique, healthy lifestyle, and increased self esteem so she divorced him (the fact that he had a lot of money was probably another motivating factor).  But I am happy to report that despite losing half his stuff, he is still happy and healthy and is now engaged to a very beautiful, smart, and successful ex-fatty.