I am a male. When I was around 14 or so I used to play with my younger sister (who is about six years younger) than me by pulling her onto my lap and tickling her, which gave me a kind of stimulation. I would often tickle her in between her legs and occasionally it happened where I'd kind of tickle her underneath her shirt.
Sometimes she was wearing a nightgown so tickling her in between her legs meant that she only had underwear on. Once her sitting on my lap made me ejaculate in my pants, though I did not mean to or intend to (and I hated the fact that I did). I absolutely hate that any of this happened and I hate myself for having done any of this. Even back when this stuff happened, I never masturbated to the thought of my sister or anything (I disliked the thought of that even back then); the stuff that happened was purely for stimulation and I wasn't into her.
Furthermore, I never would've done anything at all to her that felt like abuse; I wouldn't have wanted to harm her in any way or do stuff that was abuse. The more time that passes, however, the more I hate the fact that this stuff ever happened (I'm 17 now). Back when this stuff happened, I guess I felt like it was fine because I was just doing a relatively normal thing (tickling) and getting something weird from it, but the older I get the more disgusted I get from the fact that something I ever did any of this.
I could never imagine doing something like this now and the thought of it is disgusting, so I guess it's safe to say that I've matured, but I still hate everything about the fact that this stuff happened. Thinking about this having happened feels almost unreal, so maybe that's also a sign that I know that I'm way past it? Is this type of stuff normal? I've heard that a lot of people do weird sexual things as kids, but I'm hesitant to believe that they are as weird or bad as what I did. I just want to be able to believe that I'm not a disgusting pervert and that I'm a normal person, but I don't know if that's true.