It doesn't make sense anymore. The reason why whole thing exists is because females pay high price for pregnancies, so they have to be choosy. Thus males have to compete with each other for chance to pass their genes by bestowing resources attention and good will towards females . When females avoid the consequences and males no longer receive biological rewards by means of birth control, the whole thing breaks down. When sex no longer means procreation roles of persuer and persued become illogical. The 80-20 rule is now running on fumes. It is nothing more then a sexual market value bubble. And it will burst.