There's always been an analysis that visibility of homosexuality killed homoromanticism and cast a shadow on homosociality. The thing is, I think it's the visibility of sexuality in some ways that is a unique 20th century thing and that this created some interesting social dynamics probably. I think a big thing that happened in the 20th is that sexuality became much more brazenly open over the course of the century. Or it may be that it was suddenly more VISIBLE. And accessible. But visible is a big thing, thanks to the rise of mass media, and among other things much that mass media is originally not made for the tastes of the elite and it is made by people from social classes with more heterosocial norms than the elite have. "Lowbrow" culture actually became a strong broad mass culture norm. Twentieth Century mass media does not actually have an elitist history. A chunk of your favorite fandoms and songs were originated by working class people, by veterans, by people who don't really make it into the public eye now. Counterculture people, and even people who would never be heard now because they would've been siloed up into a fringe political pipeline by now. It was actually a lot harder to escape seeing porn mags and nudie posters in the 1970s and 80s than it is now. Porn went online since then and now it is even leaving the commons. A ton of the mass media a Twentian grew up with, would be social content now. Social media and meming are the shape of that in the 21st century. And that stuff is on platforms that have nanny rails. In the 20th century, there starts to be ample physical record of the tastes of people far, far outside what we get from the tastemakers. (And part of the vibe change we all feel - is media consolidation and siloing, and the massive changes to mass culture over the last thirty years.) In the 20th, sexuality becomes visible. People have more reason to worry about what their daughters are getting up to. And oh noes they might be riding in those SIN WAGONS and mingling with... the... wrong... people... (Speaking of sin wagons, this is another way a part of the culture is actually kinda pre-Twentian. The same people who don't like cars. Twentians love the sin wagons, though they're too small to sin in now) And the arguments between Freud and Jung as the century opens are practically one of the central arguments of the 20th. But anyway one thing that happens during this very very horny century is that practically everything starts to be sexualized. Every interaction with anyone, over time, starts to be sus for potential screwing. Stuff that's borderline pornographic by others' standards starts to be very visible and we start to have rapid churn on modesty standards. And to truly comprehend the culture change that happened between 1900 and the 20s, consider that the distance between Gibson Girls and flappers is roughly... emo kids and now. The 20th century is an openly bawdy century. And the culture struggles to contain it. The 20th is like someone sitting in the corner who is desperately struggling not to touch themselves. Its sexual energy is like me when I'm trying not to stim or pace (because I'm a human perpetual motion machine). It may BE all the chaos that Deco Twentians lived through over the course of a very violent, disease-ridden, war-ravaged period of history of absolutely colossal technological and infrastructural change. I mean... all of that uncertainty would make me want to live for the moment, too.