You can tuna piano, but you can't piano a tuna!
IT'S NOT A TUNA!!!
Because a tuna can!
A chicken and an egg are lying in bed. The chicken is leaning against the headboard smoking a cigarette with a satisfied smile on its face. The egg, looking a bit ticked off, grabs the sheet, rolls over and says... "Well, I guess we finally answered THAT question!"
Because it was covered in sheet
They both aren't artichokes
You can tuna piano, but you can't piano tuna.