It was great to see Santos back. I knew he was really desperate to get out of gym and take up his new class in art. Santos is this really hot Latino guy that has a really nice smooth body with a nice 8.5 uncut cock that is ready for my experiment. I took me a while to perfect but this is the first time I would have used my new experimental toy on anyone else except for me. I checked his vitals one last time and I also check his body temperature. I like taking the temperature rectally so I had him turn around and place his butt up on the exam table. I inserted the thermometer into his ass and then checked his penis and balls. His temperature was normal and then I proceeded with the experiment. I felt around his penis and testicles and then introduced him to my new toy. It as a new & improved dildo designed by a special team of doctors to create the ultimate dildo for both Males & Females. I lubed up his ass and the dildo and slowly inserted the device into his tight hole. Once in and secure, I turned on the power and it was teasing his prostrate and this kept him hard. While inserted, I felt his cock and stroked it for a while I then increase the power because his ass was so tight, the motor sounded like it had troubles working. Once I increase the speed of the dildo, it really made him moan and groan...He took a hold of his cock and kept on stroking it as I was now inserting the dildo and fucking Santos with the dildo as if it was my own cock. I then wanted to really see if the dildo can work, I increase the power even more and this drove him nuts. I then held his nuts in place and was inserting the dildo. This boy was really riding this thing as he stroked so hard his cock blew up and erupted with cum flying all over the place, it was like a stream of jizz flying everywhere. My experiment was a success, I think I needed to make some minor adjustments to the device but it was a great success and I gave him his note to get out of gym. I'm going to make some adjustments and lets see what happens when I use it again on another patient.