Marks

Where do players hide their marijuana?
Between the stash marks.
She's been married so many times she has rice marks on her face.
Henny Youngman
How can you tell where the Easter Bunny left his treasure
Eggs marks the spot.
Albert Einstein, Blaise Pascal, and Isaac Newton decided to play a game of hide and seek.
Einstein covers his eyes and starts counting.
Pascal runs off to hide but Newton takes a chalk and marks a 1m×1m square on the floor and stands in it.
"Ready or not, here I come!" Einstein exclaims while he opens his eyes. He sees Newton standing out in the open and says "Haha, I found you Newton!"
Newton replies "No, you found Pascal."
How do you know when a cephalopod has been using your toilet?
Squid marks.