This is how the fantasy goes

Next, you inform your friend that he needs to be lubed and a black electro flex rubber ring is going to be slipped over everything; the foreskin and the glue board that is attached to metal ring. You tell her that he is glued back this way so as to not allow the foreskin to crawl back up and interfere with what you are about to do. You use a non-needle syringe and draw from the heated metal cup a good amount of warm cocoa oil, coating him all the way down the shaft, and then slide the rubber ring down the shaft and over the glued foreskin. There is a little bit of resistance to get it over the metal-glue-board ring as he has swollen and that ring is actually bigger than the rubber ring, but after coaxing it a bit, it slides all the way down near the base. You friend asks you what are the two tiny metal knobs sticking out of the side of the ring. “Are they some sort of collar studs,” she asks? You let her know that all will be revealed in a little while. As you hold everything down tightly against my body, he becomes fully erect and bl**d-gorged, reddish-purple in color as you slowly stroke him using some more warm cocoa oil; having it dripped over his head, down the mushroom part of the head and along the shaft.