There are going to be moments in fatherhood\u2014when you\u2019re dancing to Baby Shark to entertain your kid, or you\u2019re way into the third book in the Twilight series for your daughter or you\u2019re making the lamest dad joke of all time\u2014where you might be tempted to step back and think: Oh God, what would the twenty year old version of me think of this? I told myself, I\u2019d never be this guy, and here I am setting up a tent at a soccer game and putting sunscreen on my nose. If they saw me right now...