22 - 48 BC Messalina, wife of the Roman emperor Claudius.... "One is the story of her all-night sex competition with a prostitute in Book X of Pliny the Elder's Natural History, according to which the competition lasted for 24 hours and Messalina won with a score of 25 partners." No internet back then
14/15 year old kids were having sex when I was at school, including me in the late 50s, early 60s.
Its just more open now, and teenagers through lack of discipline, dont give a dam.