How we schedule father-and-son bonding in the midst of a demanding work day. — Some days, when I’m wrangling a toddler, a Radio Flyer push-car, an assorted zoo of winter outerwear, a snack cup, a travel mug of hot tea, and my elephantine purse into a car that desperately needs to be vacuumed, I question my love for my husband. But only for a…