What evil/cruel/gross items should be used as a forfeit for every ship sunk in a messy game of battleships? No limits, lets hear your suggestions! Either comment or inbox me with ideas.. Go!

paint, and let it set

Raw eggs, poured inside the person's underwear.

Good starts, thank you for the suggestions
I'm sure that worse can be done!

Navy beans would seem to be the natural choice.

I remember a show on Nickelodeon from eons ago where they were playing a game of human battleship, where everyone from each team would stand in a particular square and when you picked an opponent's square, they would dump a bucket of navy beans on the square. And if someone was standing in that square, well...

Something I wouldn't do but pet food

All good suggestions, thank you my lovelies!

Me painting the body, watecolours mabe?