Me and my partner are planning on having some fun, was wondering if there were any games we could play as a couple that used mess as a punishment for losing?
Scissors - Paper - Stone is the easiest, the winner of each round gets to do something messy to the loser.
For a more elaborate set up, take a pack of cards, remove two suits, then make a list of 13 possible ways to mess each other up, for example the Aces could be "fill their underwear" while the Kings could be "pour over their head" and the Jacks "make them sit in a pie", and so on.
Pick one of the remaining suits each. Shuffle the half-pack of cards, then just draw them one by one, what suit it is decides who gets the mess and what card it is decides how/where the mess is applied. You know in advance you'll both be suffering all 13 ways of getting messy, but only the cards decide in what order you each receive them.
And as you still have the two unused suits left, you can play exactly the same game a second time at a future date.
How well do we know each other? challenge in which the wrong answer implies a messy punishment (pied, egged, gunged ...) oun you and a correct answer implies a messy punishment on your couple.
A simple option with a deck of cards of you like chocolate & strawberry syrup or similar colored slime, play a simple game of higher or lower. Each flip a card, lower card loses, forfeit is a pour of chocolate or strawberry syrup depending on the suit of the losing card.