At the opening of "Shore Leave" Kirk has a kink in his back in the Captain's chair. The pretty Yeoman Barrows standing behind him starts massaging his back, and he says "Dig it in there, Mr. Spo---" as Spock steps forward and Kirk embarrassingly realizes that it's NOT Spock rubbing his back. Now I've never subscribed to slash, but that does make one wonder about their relationship! See it Here: [link]