Here's a reason to take turns doing the dishes with your significant other: shows the more equally you split housework, the more sex you have. In the past, , but the reversal makes sense considering couples today say they're most satisfied when sharing responsibilities, whether that be earning money, parenting, or cooking dinner. And satisfied couples tend to get hot and heavy more often. "Today, love is based on shared interests, activities, and emotions," historian Stephanie Coontz said in . "Where difference was once the basis of desire, equality is increasingly becoming erotic."