Recently a strange curse was discovered in a big town, labeled as the "body part bet curse", was turning into a popular game among teenagers and young adults since older ones didn't believe too much in such "stupid games".
The game consisted in challenging one or multiple people to participate in the game, where they could bet their body parts, following the rules:
1. To start the game the person must say to their desired participants "I curse you to a body part swap".
2. All nominated players should agree to start the game, otherwise it would start with the players that accepted.
3. None can leave the game until it ends, only the host can decide to free a player or cancel the game.
4. At least one body part should be bet, no matter if it's only one player betting their body part.
5. The host must say what game they would be playing to bet.
6. The host can decide the rewards of each position in the game (ex: first player gets a pair of breasts and one arm, second gets a leg, third one gets nothing. Or, winner gets a penis, loser gets one hand), the rewards must be body parts that the players agreed to bet.
7. The participants must be living beings understanding what they are getting into.
8. One participant can bet multiple body parts.
9. The changes in the body of the participants will start when the game ends.
10. The winner can decide in what part of their body would place the body part they got.
11. The changes in the body after the game ends are permanent unless they decide to participate in another bet.
12. The host can decide what body parts will bet each participant as long as they accept.
With all that stated, choose the story of who will participate in this curse.