It was one of those days where nothing worked for the Left paddle and the loses just piled up. Attempted sharp returns were missed, a twitch caused a lost point, and he completely whiffed a serve by not paying attention. In frustration, Left cursed and refused to play any longer. Hours later he returned, but Right chastised him for poor sportsmanship and refused to play him for a whole day.
The next day Left returned sheepishly and the two enjoyed their games together again.
Lesson: Be modest in victory, gracious in defeat, and keep playing. It's only a game.