You can tuna guitar but you can't guitar a tuna!
You can tuna piano, but you can't piano a tuna!
JaPAN! From my 9 year old.
You: You can tuna piano but you can't piano a tuna! Person getting told joke: What about the jar of glue? You: I knew you'd get stuck there
Tuna (2Na).
Two. One to cut and one to glue
You can tuna piano but you can't piano tuna!