Your Heart Is a Muscle is kinda one of the weaker moments on Kiss but it's great lyrically. The central conceit is v clever.
Guitar String/Wedding Ring is good but it took months for it to grow on me. It's hard for me to believe that that song came from the same team as Call Me Maybe.
I mean, how can you possibly hate on Guitar String/Wedding Ring? It's the happiest song ever. Even my mom stans for it. I should let her participate in rates too in the future