I was making my rounds when I notice Damien  cleaning one of the exam rooms. So as I enter to greet him and just shoot the breeze I see he's intrigued with the e-stim machine. He asked how to clean it since he's never really noticed it before and asked what it does. I asked him if he would like to try it for educational purposes and he was game!
 
 
 
I made him remove his scub bottoms and underwear and lay on the table. After explaining what it was and how it worked I placed the straps on his dick and turned the machine on. Instantly he became erect and moaned with pleasure...I really think he liked it. I enjoyed watching him squirm as the electro stimulated his now rock hard dick...and with just a few pumps he shot a load in the air. I guess I have a new assistant whenever I need to e-stim a patient