It’s not that your nose can’t taste very much. It’s like the other three, eating a nose won’t taste very good.

You’re supposed to get to the nose and think about how it definitely wouldn’t taste good. Then you think about how it doesn’t really smell that much better than you imagine it would taste. And then you go “Ahh. Smells! My nose is good at smelling!” and then die laughing at the hilarity of the wordplay.