When I was seven, I found out about sex because my friend showed me pornography that she found on her dad's computer. I was very intrigued by it, and afterward I frequently encouraged my brother (almost 2 years younger) to play "house" with me, which included sex. We didn't actually have sex, but I told him about it and wanted him to act it out with me. We also played games like "doctor" or "party" where we basically got naked and messed around. I never forced him into anything, but I was always the instigator. Looking back I feel so gross and ashamed, especially because he was never as enthusiastic about the game as I was. I wasn't doing it out of lust or anything, I was simply curious, but now I feel like I may have been sexually abusive to my own brother and it really bothers me. We're in our late teens now and it hasn't come up since we were kids. The last time I mentioned it was probably six years ago. All we did was look at each other uncomfortably and say "yeah, that was weird."
Anyway I hope I didn't do something psychologically harmful to him. I was young myself, but he was younger, and I just feel weird thinking about it.