when I was 14 (or 13 I don’t really remember) I made my little brother that was around 8 years old s*** my d*** (I did it by telling him to do it in return for letting him use my phone for games) and it still haunts me to this day (turning 18 soon).
I wish I could undo it. The guilt that he might have psychological issues because of me haunts me all the time even after that long of a time.