Because they've been abused

Children are, as tpka "HappyDay" put it "more advanced sexually" due to them being victims of child molestation, either hands on by someone in their own community or via social media and messaging apps on their phones. Many victims of sexual abuse go on to act out their abuse with other children without realizing the likely ramifications of their perverted behaviors until they find themselves in sex offender counseling if they are lucky or in children's prison if they are not lucky. Sadly to see people brazenly bragging about seeing "pedophillic material" here on BC as if witnessing the abuse of crime victims makes them some kind of informed, knowledgeable expert on all kids nowadays. There have always been sexualized molestation victims who appeared advanced for their age, but that says nothing about kids in general. People should not take any lesson at all from the behavior they observe online, for if they treat a normal child like one of those sexually advanced children they've seen online they are likely to traumatize the child and find themselves in hot water.