I’m sure I’m not the first person to realize this but the scene of Batman naked, alone and seemingly depressed in the shower in the Ultimate Cut is meant to be contrasted with Clark in the bathtub with Lois earlier in the movie. (Also a longer scene in the ultimate cut.) Bruce is isolated and alone and he’s showering alone. Clark is also undressed in the bathroom but he’s smiling and he’s not isolated or alone. He’s holding Lois. It’s a simple way to highlight the different ways both men cope with difficulty and struggle. Bruce tends to turn inward and be alone. He struggles to let people close. Clark tends to lean on Lois. He draws strength from intimacy both emotional and sexual. It’s actually a pretty great parallel that communicates a lot about who they are.