This is true at our house:

It is my strongly held opinion that women don’t tend to do more housework because of some extremely complicated logical derivations - they do more housework because for mostly innate reasons, they derive more pleasure from having an ordered and kempt house than do men, and so when a typical man reaches the point where a marginal unit of house cleaning is not worth the additional unit of labor, he stops, and a typical woman - for innate reasons - still sees the next few marginal units of cleaning as being worth more than the cost, and so she does more housework.