I was in the car on a Thursday night, driving my two kids to soccer practices. At a stop light, my daughter said from the back seat, "Momma, I have a question for you, and I need you to tell me the truth."  I braced myself. I thought this was going to be one of those serious questions about life, the universe, and everything. Maybe about how babies get in the belly or whether Santa is real.  Instead, she threw me for a completely different loop.  "You know how you don't do hard things all day long like moving heavy stuff or running all day or something? So...why are you so tired all the time?" Oh, child. Let me tell you why.  I explained that there is a difference between physical tiredness - from playing soccer or moving heavy things all day - and something called the mental load. Like it or not, women - especially mothers - still carry most of the mental load, and it is exhausting. It's five hundred small decisions every day that affect a thousand other th...