This comment alone shows that HN suffers deeply from not having many women participants. If y'all had more female commenters, you'd know that you don't get to see a bunch of girls naked in a high school or college locker room. Everyone is so insecure about their bodies that they change in the toilet stalls or take their bra off under their shirt then shimmy the sports bra up under the shirt and hook it then change shirt, or put on a towel to keep it all out of view. Being a teenage girl really sucks in a lot of ways. Of course one would have gender dysphoria if it has a glimmer of a way out of the trap of having to be look perfect, act perfect, get perfect grades, be a perfect friend, be perfectly sexy but not a slut, be perfect but not stuck-up etc that teenage girls face every day. (I understand that teenage boys face another set of pressures that can also be crushing -- as a teenager though you always think that someone else has a more-perfect life or a greater set of freedoms, right?)
As for the headline "Teenager finds way to push parental buttons: this never-before-seen act is the fault of liberals" yes, can confirm that toddlers start practicing early.
Reading a comment like this I mainly think "wow TV and social media have really f-ed up young people these days".
Back in my high school days, we had some bathing events and also shared sauna. One could either voluntary use the nude beach, or walk a bit and go to an outdoor pool with proper changing rooms and dressed people.
I think the split was roughly 50/50 and there also wasn't much gender skew.
But that was a time before smartphones. When people still walked over to each other's house to hang out.
When I was a teenager on the swim team in the early 00s, the school had to ban 'deck changing' [changing into or out of your swimsuit in view of the public] because, in a game of one-up[wo]manship, it became overtly sexual with towels falling "by accident." The sort of prudishness described above surprises me.
As for the headline "Teenager finds way to push parental buttons: this never-before-seen act is the fault of liberals" yes, can confirm that toddlers start practicing early.