Today's the last day of my paternity leave, so I wanted to reflect a bit on the experience. When I tell people I'm on a 4-month leave, the initial response is typically surprise that my company offers such a generous benefit. Facebook's paternity leave policy is unusual, but I hope it becomes less so. It's good for gender equality in the workplace and it's good for families with fathers. That's typically followed by surprise that I'm actually taking it -- why would I want to subject myself to that torture (from parents), why would I want to sit around and do nothing for 4 months (from non-...