Simple Bathtub Scenes meant mostly for Fanservice
One of the most simple forms of Fanservice is having an attractive female or male spend a small amount of screen time in the tub. Many films usually use this as an easy excuse for nudity. Even though they are not very necessary, Bathtub scenes usually seem to sneak their way into many forms of media even though they are most of the time unnecessary to the plot. When bubble bath is involved Censor Suds usually come in.