from the reddit post:

"I began almost as soon as we got into the conference room,' FDR told [U.S. Secretary of Labor] Frances Perkins. 'I said, lifting my hand to cover a whisper (which of course had to be interpreted), Winston is cranky this morning, he got up on the wrong side of the bed. A vague smile passed over Stalin's eyes, and I decided I was on the right track...I began to tease Churchill about his Britishness, about John Bull, about his cigars, about his habits. It began to register with Stalin. Winston got red and scowled, and the more he did so, the more Stalin smiled. Finally Stalin broke out in a deep, hearty guffaw, and for the first time in three days I saw light. I kept it up until Stalin was laughing with me, and it was then that I called him Uncle Joe. He would have thought me fresh the day before, but that day he laughed and came over and shook my hand.

a lib like FDR would have fit in with us