Interesting idea Eminence! Equal skin in the game. The father and mother both have to make child support payments (90% of their income) to a holding account for the child with required approval from both mother and father for any expenditures. If a father misses a payment then slavery for him and if the mother misses a payment then slavery for her. Life sentence and equal skin in the game. The mother and father, in the case of separation, both get 50% custody. The mother and father both get absolutely equal say in decisions involving the child. In the case of abortion, both the mother and father get absolute equal say. There are no tie-breakers. If mother wants an abortion and father does not then they do not have adequate consensus to take any action.
I'm not sure I'd support your dystopian idea for how you believe parenting should rightfully function but I'll admit that 'Eminence's equal-skin-in-the-game model for parenting' is an intriguing thought experiment. Good luck getting women to buy into it but fishonjazz seems to like your proposal.
Would you say busting a nut and a carrying a pregnancy to term are approximately equal amounts of skin?