I have to wonder, do people without kids really know what they're saying when they say they're tired? I mean do they KNOW what tired can feel like? Tired is having a newborn and a 2 1/2 year-old. When you're functioning on a daily basis not really remembering what rested feels like. Not seeing rest in your near future, knowing that this cup of coffee is your replacement for sleep is like..sad.
But those kids sure are cute, and if you keep reminding yourself that you'll only be 40 when your son graduates from highschool, well... there is hope.