Teaching Very Young Brother

Where do I begin? I think i started by showing my Lil bro porn and how to jack off... And ill tell u what, for an 7-year-old his dick was just as big as me, 13... Half black lol ill never forget the first time we messed around. I sucked him off while he watched porn... he was standing and when he was getting off, his knees buckled and he let out the hottest soft moan..... i rather have a cock in my ass(my moms bf taught me to like anal secretly)over giving or getting head... anyways, i let him top me... first time i had him lay flat, back on the ground while i squatted up and down on him because he couldnt keep it in very much lol he got better.. but we had a lot of fun back then thats for sure