A proctologist is about to write a something on his patient's notes but when he goes to take his pen out of his pocket he realizes it's actually his thermometer that's there.
My pen ran out of ink and an ink fairy in the shape of a squid appeared. He said if I let him eat my dinner of shrimp he'd help me out by giving me some ink. The deal smelled kind of fishy, but I needed to finish my homework. So we did it squid pro quo.