"Sims 3 Sex" refers to a genre of adult content that involves the use of the popular life simulation game, The Sims 3. In these videos, the creators manipulate and control the characters (Sims) within the game to engage in various sexual activities or role-play scenarios. As this is not an official game feature, it often involves modding or custom content to enhance the experience. These types of videos are intended for adult viewers and are not affiliated with or endorsed by the official game developers.