2 Comments:

Men with high mate quality (e.g. handsome, rich, etc.) tend to do less parental investment (because they have greater mating opportunity costs). Their mates put up with it, as it were, because of the trade-off for high mate quality. These men tend to have greater facial symmetry and testosterone, and women are more likely to have sex with them. The men themselves, might provide positive feedback here as well (e.g. greater testosterone leads to greater sex drive).

Its based on principles for Parentla Investment and Sexual Selection theory.

Seems like they could easily be confusing cause and correlation. Seems entirely possible to me that men that are more prone to do "womens's chores" could easily be men with lesser sexual drives--or they simply have less direct and forward mentalities so they're less likely to initiate...activities...to begin with.