> You could do it differently, but that only works if you swap one, not share half half.

I disagree. But I started nurturing early by planning and orchestrating all our births (home, birth center, birth center, twins/hospital) and her prenatal care.

Much later, my wife developed psych issues and in the end I was performing all roles to our 5 sons. But well before then I was deeply into nurturing our sons as infants, toddlers, PreK and grade schoolers. I changed most of the diapers (cloth! for sons 1 & 2.). I packed lunches, did cub scout leadership, cleaned up the wounds and encouraged them to go get more.

Compared to competent moms and dads, I wasn't substandard, insufficient or compromised in any way.