Would you accept a thousand tiny pains that add up to unbearable agony?

Warren Quinn imagined a device with a dial fitted to your body: each week you're offered £10,000 to click it up one notch, causing a jolt of current too small to even feel. Every single click looks like free money. But keep clicking and you eventually end up in constant agony — with no click you can point to as the one that went wrong.

— Warren Quinn, The Puzzle of the Self-Torturer — Philosophical Studies, 1990