Einstein went to look at a kibbutz while on a visit to Palestine in 1921. He asked many questions of the 22-year-old girl who was head of the young community. One question was, “What is the relationship here of men to women?”
Thinking that he was one of the many visitors, who thought that women were common property in the kibbutz, she stammered, very embarrassed, “But, Herr Professor, each man here has one woman.”
Einstein's eyes twinkled. He took the girl's hand and said, “Don't be alarmed at my question – by “relationship” we physicists understand something rather simple, namely how many men are there and how many women.”