While puberty has always started with hormonal shifts, 1990s education focused heavily on the mechanics of menstruation for girls and nocturnal emissions for boys.
The Dutch model of sexual education— Sexuele Voorlichting —has long been praised for its openness. By 1991, the Netherlands and other European nations were already leading the way in teaching that sexuality is a natural, healthy part of life, rather than something to be feared or hidden. While puberty has always started with hormonal shifts,
For the first time, educators began discussing "peer pressure" as a biological and psychological factor of the teenage years. Puberty Education for Girls (1991 vs. Today) healthy part of life