Military service in a combat theater is a lot like sex. Both can be pretty exciting, sure. But one of the more nuanced rules applies to both — anyone who talks about it a lot has probably done it the least.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.