I could find uses for an inanimate third ear. I'd plonk on some headphones, get some tunes playing whilst the Mrs is tearing strips off me. When she thinks I'm not listening I'll just point to my chest ear, give her a thumbs up and say, 'I'm listening love, don't worry.' I won't tell her my chest ear doesn't function.
It may lead to trouble later on, but I never think that far ahead. (Speaking of said trouble, I might as well vote for being shot in the arse too.)