I lost my first bet this millenium. My wife and I decided to eat tacos for dinner every night until one of us cracked. Even the mighty Jim was taken by surprise- he told my wife, in person, that she didn't have a chance.
Cream cheese, tomato, onion, swiss cheese and homemade lox on a sesame bagel was my downfall.
Part of the wager was to announce defeat to the world and to accept any derision thrown my way. Do your worst.