Hearing I was younger than my wife, her older sister joked "You dirty old woman!" π€£ Early ref.s cite it as _ideal_ rather than lower limit π e.g. Frenchman LΓ©on Paul Blouet. Also, sexism: man to be older. Wikipedia: en.wikipedia.org/wiki/Age_dis... And of course, XKCD gets last word: xkcd.com/314/