Good question. Although we love our dads, mothers are much closer to us because we come from inside them. Indeed dad helped us by contributing only a squirt of sperm , and a microscopic one of thousands to penetrate the egg, but mom did most of the work by carrying us around for nine months.
I loved my father, and it is a wonderful feeling to have good old dad riding us on his knee on those horsy rides, but when dad gets aggravated, and disgusted , and agitated , it is time to run for your life to mother into mom's arms as we escape the wrath of dad.
Moms are ususually with the kids 24/7 while dads are not.