Dr. Topnbottom told me to grab the cock at the base of his penis very firmly. Then take the whole thing in my mouth. As I did so, I paused for a moment to make sure that what I was doing was right. The Doc told me to keep going, and so with the whole thing in my mouth I was working on trying to get him hard. I was told to lick his balls for a while, and as he started to get harder. The Doc made us pause to take off our shirts, so that we didn't get too hot.. When I went back to giving him head Kyle seemed to get a lot harder. Still the Doc wanted to show me some more techniques to use, by showing me himself. Pushing Kyle back against the table, Topnbottom took a hold of the throbbing cock and put it in his mouth. In watching the doctor he did this twisting motion with his head, as he went up and down. I stripped out of my clothes, and down to my underwear. I stepped in closer to Kyle; and I started to lick his nipple to have something to do. That was when the Doc tapped me on the head and told me to lick Kyle's ass hole.