” Doc responded, “This can get technical, but the type I have is called a circumferential transducer. In simple terms, an electromechanical strain...gauge is placed around the penis shaft to measure changes in circumference as the blood flow changes. In this way, the amount of arousal can be measured when I present differing visual stimuli, and we can see what excites the men sexually. The legal system uses these devices to try to prove or disprove the urges of sexual predators. But it also works. Now you have several options. Try twisting your head from side to side making sure your moist lips stay in contact with the coronal ridge. While doing this gently move your hand up and down the shaft. When he climaxes he may want to push your head further down the shaft of his penis. He wants to envelop you with his penis. As you are learning his climax, you will miss the fine points if you deep throat at this time. Instead gently suck around the corona as he climaxes so that you can intensify. "He doesn't lose face well."My cheeks warmed when the girlfriend added, "He looks pretty young, Boorman, I don't think you'll get a normal workout from him. I doubt he has the fast reflexes of a pilot either."I was perplexed how coming to the gym had gone bad so fast. My instincts measured up the laughing man but I'd not seen him in action. I had a gut feeling he went for overpowering moves to keep things short. He wanted to hurt me and then magnanimously let me off the hook.The woman began. She was kissing me deep, then all over my face and neck, driving me wild. My cock was rockhard. It felt like it would explode before it was even touched. I looked Sara in the eyes and asked if she was sure she wanted to do this. She had broken up with her boyfriend a week ago and I did not want to start something that was not going to get finished. To answer my question, Sara sat up, straddling me and untied the belt of her robe. Tossing her head to clear her long hair from her face, she slowly.