I have literally no idea what you're trying to say. "UOH

" is a meme referencing a tweet about children being erotic and there is no other meme being conflated and there is no meme being evolved from.
There was a meme about pedophilia from when I used /b/. There was a bear, called Pedobear, and the joke was that he was a bear that wanted to fuck children. It had something to do with 2ch, I forget the origin story. People would post him in jailbait threads and then the meme evolved to be a Tom and Jerry style feud with Chris Hansen, because To Catch a Predator was very popular at the time. The other part of this meme was that a lot of people on /b/ at the time were teenagers so while the jailbait is really gross in retrospect a lot of the posters were about the same age.
This uoh shit is all adults and there's no other shoe falling. The joke is that there is no joke: child tummy erotic. It's a memetic dogwhistle.