As a young child, I remember always rooting for the villain in those storybooks about animal predator antagonists chasing after animal prey. There were a couple specifically that I read over and over again, always fantasising that they would end differently - one, specifically was about some field mice who sneak into a farmer's home and eat his food, and then are chased by a cat. Another was about a fox and a rabbit.
I remember thinking about the predator catching their prey and eating them brutally always gave me a warm feeling in my stomach - sometimes even imagining myself as the predator.

I also used to play this game with my father when I was very young (maybe 3-5) where he would pretend to be a giant who swallowed me alive and i'd have to climb out of his stomach. I discovered a children's book about giants catching some human children and keeping them as pets as well when I was about 9 or so. I read that book over and over and over again.

I don't really have much interest in micro/macro or vore now, though, however I do feel a similar warm feeling to the one I used to feel when I look at those pictures of girls being cooked alive and eaten.

Also, always been a fairly violent/aggressive kid (though likely in part due to being bullied at school when I was young).

At about 3 or so, I hatched a plan and tricked a girl from kindergarten who I didn't like into visiting my house that weekend. When she visited I got her to lay down on the sofa and then went to the kitchen. I contemplated taking the scissors but thought, even at my young age that that might end up with me being punished severely so decided on sticky tape instead (I used to watch my mother wax her legs, and in my mind sticky tape was like waxing strips). I taped over the girl's mouth and stuck tape all over her arms and legs, and ripped them off as hard as I could. I remember it was not as strong or painful as I wanted it to be but the girl was screaming under the tape over her mouth anyway - I remember how wide and fearful her eyes were.
I kept telling her things like "it's okay, it's just waxing!" while I held her down, haha. Eventually my mother ducked around the doorway to the living room and asked me what I was doing and I just smiled innocently and said 'nothing!' - despite the girl still panting and sort of screaming under the tape my mother just turned around and left. I figure she just assumed we were playing, or didn't know what to do.

At 12-13 I went through an edgy grimdark phase where I loved creepypasta and torture porn. I wasn't in the best place then and fantasised a lot about hurting and torturing my peers at school.

Now, though, most of my fetishes and fantasies are about being submissive - despite my incredibly low pain threshold I often project myself on the subjects in torture porn stories and art, etc. I also love the idea of being used - rape stories, humiliation, etc. Rape is definitely a big one for me and I love power imbalances. Despite my current age I love the idea of someone fetishizing my young face and appearance - Being kidnapped, thrown into a van and then being used by some sicko with a strange, possessive obsession with me, having people rape me and getting off to the idea of taking my innocence while I thrash and beg, etc. Psychological torture over physical torture, but I do love the idea of being the subject of a vivisection someday. Anaesthetic and modern medicine is a blessing.
Feel like a lot of my submissiveness/wanting to be used probably stems from daddy issues, though.