When I was about eight years old, our neighbour’s girl of around the same age (eight) used to show me her private parts, purely of her own volition. She actually initiated wanting me to investigate such parts of hers manually. But, believe it or not, it was completely “innocent” (as per both our ages).
As a matter of fact, afterward I asked my mother how the seeds (genetic material) get from the male to the female. . . . . Boy, was I clueless! (And what a wasted opportunity.)