I think part of the reason K-Pop is super sexualized is b/c porn is banned in Korea. I can't imagine what's more immoral: woman wearing pants up to their ass cracks gyrating each other on prime-time network TV or consenting adults having sex in a product that's sold only to adults*.
*yes, you can find porn for free on the internet w/o age checks, but that then's an issue of bad parenting as parents should not let kids on the computer without any supervision and/or filtering software.
That's why I follow very few Kpop groups (Being a metalhead, I'm looking for good music first, not hot girls with shitty songs).
One of my fav Kpop group :
The groups I follow aren't doing a sexy concept like plenty others do. I think Kpop is looking more and more like western music with girls half naked in the music videos (AOA, 4Minutes, ...). For me, woman wearing pants up to their ass cracks gyrating each other on prime-time network TV is more immoral because kids can see it on TV. Porn, you have to find it, so it's not exposed to everybody. Here is an example of what I really dislike :
https://gfycat.com/ifr/LazyAnchoredIrishwolfhound
Trashy !!
and
Don't get me wrong, this one has a perfect body BUT ... it's still selling a body to attract fans.
People who support that kind of girls in the west are the same who say "Oh, you watch porn, that's disgusting". When I hear that I'm like "why it is disgusting ? The girls in music videos do porn moves everytime".I watch porn to see hot girls in action BUT when it comes to music, no thanks.
Basically, porn is porn. It's made for an adult audience by adults. It's not made to be mainstream at all. Kpop tries to add sexual content in content that young teens and kids can also see on TV. Little girls will think they have to be slutty to be a woman and THAT is a real problem. You don't have to mimic sexual moves to be a famous idol/singer, just put some work in what you do and if you do good music people will like it.