Is sex allowed after surgery. I was very sick. Okay so what I want to know is can anything come from the sex? What medications will I need at home, and how long will I need to take them? I'm now concerned that much of what I took as a gender dysfunction might have been nothing more than a neurotic sexual obsession. Surgical Options for the Knee The knee supports a lot of weight and is subject to lifelong demands. That is a grand idea! The ends of the bones are covered with cartilage. I was scared to death of having sex. To be completely honest at this point 3 yrs post-op is not easy, however, I'm not sure I would do it again. Let me first go back to before my surgery.