LOL!! I think I've mentioned before that my sister had a cat who would only come in on summer nights if she whistled 'Bringing in the Sheaves'. It was the only thing he would respond to and it worked every time! Our last cat, Uncle M, liked me to sing 'The Owl & the Pussycat' to him. The Munchkin, on the other hand, gets most affronted if either of us sing or whistle and doesn't like it at all.