No, you do not have to cut or peel the skin off from the eggplant. It is completely edible but can be a little tough if it isn't cooked. The skin breaks down and softens when it is cooked and adds a nice texture to your dish. The nutrient-rich skin on eggplant is great when cook on the grill or sautéed. Peeling it is also a popular choice for many especially when making sauces.