"Shall We Dance?" is one of the most erotic moments in a Broadway musical for me. It is more about what goes unsaid, so perfect.
Also, NINE has a dozen of them, but I agree with WW11 that "A Call from the Vatican" is at the top.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"