The game starts with the dealer flipping over a card to the player on their right. This player must then guess if the penis on the next card will be bigger or smaller. If the player gets it wrong, he/she drinks a shot or drinks for the number of seconds corresponding to how far their guess was off; or simply add a truth or dare element/takes a shot/removes a piece of clothing.
1 deck of 26 A5 Cards, Available in Penis variety or Boobs variety