A Parisian bathing mystery


Like many previous hygiene mysteries in my past, the correct answer probably has to do with training and control. Yet still I wonder: Looking at the picture below of the bathtub with shower handle that is in the apartment I am staying in here in Paris, however does one prevent the water from going all over the place and still clean oneself? I have tried several things. Using the shower head to wet my body, then lathering, then rinsing. Using one hand to shower and the other to clean, then switching hands. Sitting down the entire time. But I feel clumsy and/or not fully clean with each of these. Is a shower curtain so visually unappealing? Any ideas?