These sorts of things can come from pure biology as well, not everything is related to trauma/environment even though a lot of things are. There are also cases similar to yours (people so preoccupied and anxious about sexual impulses) where they were actually harshly reprimanded and punished, by parents or other authority figures, for touching themselves and being curious about their genitalia. Sometimes people don't remember being punished because it was so early in infancy. Of course, what can such treatment achieve? The child becoming even more curious about something forbidden and also very shameful for the interest. It can generate just more and stronger impulses because it is not accepted and they are trying to suppress it.

You still have not said anything I would consider abnormal or even unusual. I have heard similar thoughts, impulses and also experiences from countless people. Normal people who do not hurt anyone but were curious kids and are still curious and sexually responsive adults. Your impulses don't sound out of proportion to me, but the associated shame and trying to eradicate them is.

BTW, when I was a young kid, I routinely got turned on by watching crime drama on TV. I had no idea it was sexual arousal though back then, just that "weird" feeling. No one knew about it, I think this is first time I ever shared it with others because I mostly forgot a did not think it was wrong. It's interesting and am really not sure how it worked. I am very confident I did not experience sexual abuse and my family was not punitive about sexuality either. I think it is interesting, a little weird, but not wrong at all. As an adult, I sometimes have fantasies about violent sex and am not averse to watching stuff like that. I was never assaulted in that way, not even mildly, and have no interest in participating. Just thoughts and fantasies.