There's actually one really interesting point in here: Zoomers are incredibly "puritanical" and anti-sex. It seems extremely weird that one of the most liberal generations ever is so sex negative.
It might depend on the country. I find them way more liberals than my generation. I mean, maybe there is more backroom in nightclub now than 10 years ago (or less?), but i've witnessed more public sex people in 2017-2019 than i ever did before. We might need data on this. Also, i have the impression that my generation restarted the "menage a trois" that i thought disapeared in the late 70s, but that might be because i became close to a LGBTQ+ community in my mid-20s that was way less impressed by sex than i was.
I am a zoomer and none of the people around my age I know are anti-sex. If anything, we are all for (safe) sex without the constraints of social pressure/puritan morality.