Starting at birth, more than half of your body weight is composed of water. The average percentage of body weight that is water remains above 50 percent for most or all of your life, though it does decline over time. I beg to differ. After being sick for two weeks and nearly coughing up both lungs, I’m convinced my body is at least 70 percent water with a mucus chaser. Quite possibly even more. That said – and with all due respect to my dear readers who may have just lost their lunch – we returned on September 22 from our long-awaited/twice postponed seven-day river cruise on the Rhine. Fourteen…