He slides down with Ianto, the two of them easily moving as one, and curls up against his side, with only a small wince as his ass twinges. It's a pleasant soreness, and one he'll enjoy very much in the coming day or two.
"I'd like that too," he murmurs, stretching up for another little kiss and then curling back down again, sighing happily as he finally lets his eyes close. "Happy Christmas, Ianto."