The French might disagree.
This discussion brings to mind the Homosexual Front for Revolutionary Action which was founded in early 1970s France, in the wake of the social and political transformations of May '68. Even though the 68ers didn't care much for gay issues, they did debate sexual liberation and of course this was probably the match that lit the spark of the revolt initially (the prohibition of visits from the opposite sex to university dorms). This set the stage for the sexual revolution of the 70s.
The homosexual struggle of the '70s was in fact closely related to the debate on the age of consent, because in 1970s France, sex between men was banned under the age of 21, but heterosexual sex was permitted from the age of 15, which was clearly discriminatory against gays. So, the Homosexual Front for Revolutionary Action actually did wage a campaign in favor of minors' right to sex, with the glorious slogan put forth by militant minors themselves, "Minors want to get fucked" (Les mineurs ont envie de se faire baiser).
This did in fact lead to a lot of controversy and discomfort among the left, and to take matters further, some proponents of sex for minors openly defended sex between adults and young teenagers (ephebophilia) as a form of sexual liberation. The extreme (who I think is more of a degenerate than a representative of the minors' sexual liberation movement) is Gabriel Matzneff, a writer that has been defending straight up pedophilia in his books for decades (celebrated by the French elites and even praised by politicians like Mitterand), and only began to have legal (and publishing) trouble when #MeToo came along, so you can imagine this was a very long time.
So, to answer the question, is there a slippery slope between (what I deem healthy) sexual liberation and "pedophilia", I'd say it depends what you call pedophilia. If you ask me personally, I don't know if it's okay for a 15 yr old to have sex with a 21 year old. I think it could be. But you have to draw the line somewhere to protect young people in general.
All that said, be advised that GW is a right wing radical, an openly declared fascist on the forum, and a notorious troll (not a "devil's advocate" as he claims). So debate with him at the peril of your own time.
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