I think Sezzybaby and logicBomb should arrange a meeting....

It come down to nature and nurture. The nature identity of the father is not as important as the nurture. Making a child takes 10min to all night and is anything but work. It is something between exercise and play. The nurture can take decades and is definitely more work.

 

As far as the traditional father and mother family, this is so ingrained in the human brain, that the lack of one or the other may create a hole in the child's personality. One parent may attempt to fill both sides but males don't make good females and females don't make good males or the battle of the sexes would settled by now.

 

Maybe what they should do is mix all the sperm together in a vat and use the mixed male blend for fertilization.