If You Were the Only Girl in the World

'[...] You can tell her from me that I wouldn't marry Bertie Roegate if he were the only man in the world–'

'There's a song of that name', said Lord Emsworth, interested. 'They sang it during the War. No, it wasn't "man". It was "girl". If you were the only... How did it go? Ah, yes. "If you were the only girl in the world and I was the only boy" ...'

Lord Emsworth and Others. 1 The Crime Wave at Blandings