CHATBOT: It had been an issue in their relationship for years, ever since they had first started dating. Mark knew he wasn't very well-endowed, and it had always made him feel self-conscious when it came to sex with his wife, Sarah. He had tried to make up for his size with other things - being attentive, trying new things, even buying toys and other aids to help them out - but nothing seemed to work. No matter what he did, Sarah always seemed to be left unsatisfied by the experience. At the same time, Mark loved his wife and was devoted to her. He didn't want to cause her any discomfort or inconvenience, but he also knew that he couldn't change his physical limitations. In his heart, he knew that he wasn't the kind of man who could be the dominant, alpha male that Sarah might have preferred. But he also knew that he loved being with her, and so he tried to make the best of it. Then, one day, Sarah suggested something new. She had been reading up on the idea of "chastity cages" - devices that men could use to prevent themselves from becoming aroused or having sex. She suggested that Mark consider using one, both as a way to control his sexual urges and to help him learn to pleasure himself in new ways. She said that it might be a way for them to have a more satisfying relationship without any of the awkwardness or pressure that had been there before. And so, Mark agreed. He researched the different options, ordered a few different models and tried them out. Eventually, he found one that he liked - a small, flat cage that was barely noticeable, even when he was wearing tight pants. It wasn't uncomfortable, exactly, but it was definitely noticeable - especially when he was aroused. At those times, he would feel a tightness in his groin that he had never experienced before, a sort of dull ache that he couldn't ignore. At first, it was weird - especially when Sarah began to suggest new things for him to try. She encouraged him to start exploring his body more fully without actually having sex. She showed him how to stimulate his nipples, his perineum, even his feet. At first, he was hesitant - it felt strange, unfamiliar - but then it began to feel good. He started to enjoy those moments of sexual exploration with his wife, even if they didn't involve any kind of traditional penetration. And then came the next step. Sarah began to suggest that Mark try anal sex. She said it would be a good way for him to learn how to pleasure himself, to learn how to have sex in a way ...