The closer that he gotta Shane's jock and exposing it for me to see, the more that I happened to acquire turned on. Dr. Toppinbottom asked him to take off his swim gear, and Shane did this single move to take 'em off out of getting down from the exam table. Using his hands the Doc took a closer look at Shane's package and then that guy looked at me. He told that since I was staying in the room that I could become useful in getting Shane hard for the endurance test. Right away, I knew that the Doc wanted me to give him oral. I got up from the chair and took Shane's 10-Pounder in my mouth. As I started to give him head, he appeared to be to like it, cuz this guy made a comment and groaned a little bit. The more that I sucked the entire thing the harder Shane's cock got making it easier to suck. While I gave him head I too played with myself to turn me on. Dr. Toppinbottom told that this chab wanted us to take a break and to have Shane move on to doing his endurance test, but just when I thought that my job was done. The Doc said that it was gonna be a sexual endurance test.