In that case, as your Master-Yami-sama, I order you.

And Marik would be really taken off-guard at having Bakura move away from him, and slide back to rest on his feet/calves, looking up at him in confusion. At being told that Bakura is going to take a shower now and it doesn't matter to him what Marik does, Marik would blink, tilting his head to a side and looking utterly confused, then just shrug and look down, not moving from his kneeling position on the floor.