The second is water. Taking a bath is not what we simply understand as soaking in hot water. You should add something to the bathtub. You can add some potions that can clean your body, and you can also put some milk or other nutritious things to make your skin feel whiter, smoother and better.
Third, there are bubbles and flowers. A ceremonial bathtub is bound to have many bubbles and roses. We usually see these stories in TV dramas or movies, so will they suddenly feel tall and advanced when used on us?