Making men less attractive after they have babies may actually improve reproductive fitness by helping solving the females-side's dilemma of being able to keep

Making men less attractive after they have babies may actually improve reproductive fitness by helping solving the females-side's dilemma of being able to keep some co-carers / resource providers / companion around for the raising of the "offspring". So I don't think it's as simple as "less sex-attractive men" (if that's even true, I don't have any anecdotal evidence that bald men are less attractive to women in any way except what women say they are attracted to, but talk about attractiveness and partner choices are often independent in reality...but it may be true I don't study it), or "less sex-attractive after some time horizon" leads to lower reproductive fitness.