"I can try," John allows, because he can't exactly promise if he'll manage it or not. He's tired, sure, but he's also uncomfortable. His arm means he can pretty much only sleep on his back, where John normally sleeps on his side. He sighs and sits up again, pushing up with his good arm then leaning to begin an attempt to undo the laces of his boots one-handed.

"You should get some rest too," he continues, "can't nursemaid me if you're exhausted."

Since he suspects Ianto is more likely to do it for John's sake than for his own.