When the pedos and pedo-defenders talk about how kids aren't innocent, if you ask for details about what they mean, they'll tell you things like "well, when I was a kid I had secret dirty thoughts that I felt very ashamed of but that people wouldn't think of as coming from an innocent kid."
And they totally in that moment reveal not only that they don't know what childhood innocence really means, and that they're pedos.
A kid having some weird off-the-wall sexual thoughts is being innocent. They're thinking about how body parts work together and what feels good to them. If a full-grown adult with normal mental development is thinking dirty thoughts and tells you about them and says they'd like to try something out, you might give that a spin. But kids, no matter what they think about privately, don't deserve to have their childhood invaded by an adult who wants to use their development as a way to vampirically gain back a little of their lost youth. This doesn't just go for the adults who actively molest kids, it goes for the neoqweers who want to give "sex ed lessons" and shock kids by telling them about fetishes and telling them all their most pervy thoughts are totally fine to enact.
There's a lot of cultural baggage wrapped up in the idea that childhood shame is the root of all problems. Goes back to Freud. But it was never true, and Freud was a fucking perv too who excused the all-too-common phenomenon of father-daughter incest as being something the daughter wanted and asked for. Some childhood shame is good for kids, and it's fine for kids to have some proto-sexual thoughts without talking to too-eager adults about a fucking word of it.