Lady Astor:

“Winston, if I were your wife I’d put poison in your coffee.”

Winston Churchill: “Nancy, if I were your husband I’d drink it.”

—1920s. There has been some debate about this exchange when Churchill's biographer said this was more likely to have occurred between Lady Astor (pictured) and Churchill's friend Lord Birkenhead. However other authors have stated that this retort was said by Churchill.