I believe it was Bill Clinton and Monica that made Fellatio the way to go.
Right after Bill it started in Middle school.
Of course it’s been around a long time, it’s just that few “good” girl admitted to it.Once sex was mostly just the missionary position during dating and experimenting later on , after marriage. Now anything goes including anal sex, watching girls perform on each other, and multiple partners.
Times change. Usually not for the better it seems.