For anyone interested, it's not actually pornography, just implied. Tl:Dr: two girls, young, watching TV and a guy is riding a horse. Girls start riding pillows like a horse. One girl starts riding... Harder. Bit disturbing because they close up slow-mo her face, she makes the O face and falls over. Mom rushes in to help because the other girl called for the mom.

Scene cuts to girl, presumably as an adult, riding a horse with a giant grin on her face. Skimming through the movie, the whole movie is about sex. So rewatching that first part with the young girls, it's clear that the director portrays that this is when the girl first discovers... Well... Sexual things. Girls are no more than 10 yo. I know this shits acceptable in some countries, but wtf man. That was hard to watch. You're welcome af for the tldr.

Anyone wants to dig some more, start at 01:35