Fundamental lore of Zen Buddhism; know as the Kōan traditional. In the west formally termed onanism or colloquially: ‘throttling the purple headed yogurt slinger’. This is the sound of skin slamming skin as “mediation” reaches the point of enlightenment.
“Ekaku what are you doing in the bathroom”
“If you’re doing nothing, why can half the building hear the sound of one hand clapping? I swear if you’ve ruined another one of my Grattan catalogues with your man milk I promise you this is the last time Madame palmer's five daughters are coming 'round to play.”