He'd bought a small house close to campus where many of the college students lived. Michael's house was the last house on the street bordered on one s...de by a wooded area so it was also very secluded. The other side of him was neighbors who were rarely home during the weekends. He didn't really have to worry about keeping his victims quiet because so many people threw parties during the weekend. Any screaming coming from his house would be confused with the loud college student parties.As he. He'd squeezed her breasts and made her nipples stick out a bit. His mouth latched onto her right nipple and he sucked it, areole and all, into his mouth. Denise encouraged him with “yes”s and “oh god that feels good”s. With Ron distracted, she look at me and mouthed “I love you” and “wow”.I smiled at her and rubbed my hard-on. Now Ron attacked her left nipple and dropped his hand out of sight. She told me later that she had started to rub and squeeze his cock through his shorts and he took the. It was obvious to me that he was trying to clinch as hard as he could to keep from cumming in her. I think when he realized he was going to lose that battle, he decided to give her everything he had. He raised his knees and placed the soles of his feet flat on the bed. Then he lifted his pelvis so he could take over the thrusting. The stranger made a dozen or so long, normal strokes, and then he suddenly tightened up everything including his ball sack and asshole. A moment later he began. This was what they were doing today by placing pain and pleasure together they could build new neural pathways in the brain through associating pain with pleasure. Both pain and pleasure were to some degree learned responses. Through association of pleasure with pain and then through reinforcement through repetition the brain could learn to build an increasing pleasure response to pain. It was the very same way they’d been taught to enjoy anal sex through stimulation of the g-spot and clitoris.