"Heavy hearts, like heavy clouds in the sky, are best relieved by the letting of a little water." - Christopher Morley (1890-1957)
Christopher Morley was clearly a chap who understood the existential ache of a full bladder. Or maybe it's just that I've been re-reading Rousseau's Confessions, almost every page of which alludes to Jean-Jacques' difficulties with (a) the ladies, and (b) urine retention. The eighteenth-century catheter wasn't all it might have been.
All this reminds me of a sign that my dad, a fellow of impeccable decorum, pinned up above the outside loo some years before I was born. It declared, in sententious script, "All the water in this establishment has been passed by the management." I lived with that sign for fifteen years, and never once thought of Morley's heavy heart.