Situation: I am sitting inside the bathtub and there is a towel on the left next to me.
Alternative situations: I am taking a hot bat in a bathtub while making sure there are enough towels in front of me. I am having a pleasant time in the bathtub with hot water, while one of the two towels in front of me falls into the water.
Question: Is the shower curtain in front of me inside or outside the bathtub?