If you already have an existing Sim and are adding the trait to them, they will still need to follow the next steps It is not recommended you physically customize the Sim at this time, as restricted access/access to the sliders requires the trait to be recognized in-game first. ✔ Create a Sim and select the Transgender trait, found in the Lifestyle category. It is intended to more genuinely represent chest reconstruction and is available for Teens through Elder. This is a very simple trait which disallows/allows access to the breast slider for transgender Sims, while still retaining the female/male assigned sex.