Ianto reached over to the ledge, picking up the shampoo in question. When Sulu asked him if he was going to do it for him, though, he paused. Why not? He knew from personal experience that it was a wonderful feeling to have someone else wash your hair for you, and well. This was his attempt at the vacation that they should have been able to have if not for all the ghost stuff, so why not.

Ianto smiled at him, coyly. "Sure, why not," he said, flipping the bottle open and pouring some out onto his hands. "You've had a trying day, fighting all those inanimate objects and paranormal figures. Why not let me do the work, this time? he asked, with a smirk. "That is," he added, the cocky attitude he'd adopted momentarily gone, as he was seeking an actual true answer here, "if that's okay with you. You're free to do it yourself, if you'd rather. I just thought," he shrugged. "Might be nice, s'all."