Stay-at-home father Jay Deitcher prided himself on “blurring gender lines,” a trait he tried hard to pass along to his own young son. So he hid the kiddie clothing that sported footballs and instead gave his son a baby doll to push in a stroller on their walks, Deitcher explains in Today.And then his two-year-old discovered tractors, and the gender-neutral charade was over. “I had to make a choice,” Deitcher writes: “buy him clothes with pictures of heavy machinery on them and make the kid happy, or force him to wear shirts emblazoned with fuzzy animals to appease me.” Deitcher...