Good old Bob senses that he may be losing the battle of the bulge and he knows that if he loses the battle, then he loses his beautiful Carmen. That's why he hired Jon. Jon kinda looks like the Greek God of physical fitness, especially when he stands next to Bob. When Bob and Jon get back from a short run, Carmen can't help but notice how fuckin' fine Jon looks compared to Bob, who is busy trying not from exhaustion. There's only one thing she can do to demonstrate her seriousness: she will make Bob see that he stands to lose her if he doesn't lose the weight!