I’ve had some luck explaining it by taking advantage of the sensitivity to fairness that people seem to have. You are the contestant. You choose a door. Monty

I’ve had some luck explaining it by taking advantage of the sensitivity to fairness that people seem to have. You are the contestant. You choose a door. Monty reveals a goat from another door. Now, instead of giving you a switching choice, Monty picks [insert person you find annoying] from the crowd. Monty gives them the option of choosing your door (duplicating any prize) or choosing the other door. The few times I’ve tried, people have seen it as unfair. But they don’t necessarily see the 2/3. They just see someone getting 1/2 vs their 1/3.