According to biological anthropologist Lee Gettler, testosterone drops in new fathers, in part, they believe, so that oxytocin can soar. Men are biologically designed to be right there with us, hunched over nappies and dodging vomit. Instead, we have bought into a cultural idea that women instinctively must know best. Keeping men at arm’s distance is called maternal gatekeeping: that you must rush in because your husband is too doltish to change the diaper just right. In upholding this concept, we fulfill a false prophecy, guarding gender roles defined by culture, not nature.
