The boy, secured in chastity, is in the sex swing, his cock locked away and his hole exposed, ready to receive a fist. I fit a gas mask and bubbler onto the boy before beginning to penetrate him. Starting with just two fingers, I quickly stretch the boy’s hole until I push past my knuckles, the most challenging part. Once past the knuckles, I add my thumb, and soon, my entire fist is inside the boy up to the wrist. With my whole fist inserted, I keep it inside to maintain the stretch on the boy’s hole, aiming to leave him with a gape. To finish, I give the boy a prostate massage, inducing an intense assgasm.