One of my friends before told me about how they found out about their vore kink when they were four. They didn't know what sex was, but they knew that the thought of getting eaten made them "feel funny".
Coincidentally, six should be the AoC :3
@b42c3131 I loved macrophilia at six. My favorite thing was cartoons where characters would grow and their clothes would rip.
@b42c3131 I don't remember a time when i didn't know what sex was. I was definitely a voyeur as long as I can remember - I spied on my parents enough to learn what oral was (though I didn't know the name) and promptly started myself a little club of other pre-schoolers (extended family) sworn to secrecy as we explored that concept.