I don't think that's it, no. I think it's the free availability of porn, thanks to the internet - and the reality that parents can't easily stop their kids accessing it, because even if their protections are almost watertight, some kid in school will have all sorts on their phone. Most kids grow up with access to it, and seeing pretty extreme sex acts normalised, and women seemingly enjoying fairly violent acts and degrading treatment, and this grooms them - boys and girls alike - into thinking this is how it should be.
Billie Eilish has spoken quite openly on how this affected her. And a few years ago there was government research done on it that was pretty disturbing - girls thinking that being choked during sex, for example, was normal.
We need to regulate porn more closely. It shouldn't be accessible to anyone who can't validate their age - and that age should be 18, minimum. And it should be a strict liability offence to enable anyone below 16 to access it, too (some still will, but it will reduce the prevalence - right now, most 12 year olds have seen at least some porn). It's a really sad reality: most children now have the vast majority of their sex ed from porn. And yet they almost all come out thinking women enjoy anal as much as men, despite no prostate, and that a clitoris is a small button and not a large root-like nerve system extending pretty widely, with that 'small button' simply being the protrusion. And then people wonder why women orgasm so very much less than men.
Porn has as much to do with real life sex as the Matrix does to the average bar fight. And yet it's the primary source material we are raising each generation on, in terms of sexuality and sexual expression.