Bit of a tangent, but following the MRA(mens rights activitst) stuff from a few years back, they had this guy relate his story. Basically he's fit, the mother is a ham. They divorce, get split custody but she feeds the boy to bursting. Every time the dad gets custody, he puts son on diet, loses weight. Goes back to ham mother, regains all the weight and then some. Court ends up giving full custody to ham mom.