The goal of the sex positive agenda is to see everyone sexually active at every age. No concept of "age appropriate behavior" and no moral judgements over sexual pairings of any type, regardless of sex, age, relation, marial status, number, or species of partner(s).
There is even a "just say YES" campaign.
Some would say instructing children to masturbate and encouraging sexual experimentation with others is corrupting a minor.
Morals have been taken out of the schools. Replaced with secular hedonism while the Socialists rise to power. Reich, Kinsey, and Feminists have sought to bring this to the world.
Free Love doesn't make one free or feel special.
In England they are pushing to encourage daily masturbation "if you CAN'T find a partner...". So by all means kids, go seek out a Friend With Benefits...
I contend that liberals mostly want everything to be anything goes sexually, because it increases their odds of getting laid. By whom, they don’t really care.