Co-sleeping — when babies and young children share a bed with one or both of their parents — has now been linked to reduced obesity. According to a new Danish study, children who regularly co-sleep with their parents are 70-percent less likely to be overweight when compared to kids who never sleep with their parents. So what’s behind the correlation? Although researchers aren’t clear on why the co-sleepers were slimmer, they have some theories, such as kids who co-sleep may have a greater sense of emotional support, whereas children who are not allowed to sleep with their parents may feel rejected, and in turn, negative feelings may increase the risk of obesity.