This may be the first time that Ianto's done this with John, but he can read the other man's body language easily enough. Bucking up against him is a pretty clear sign that John wants more out of this situation, even if he isn't outright asking for it -- not yet anyway.

Ducking his head to trail another line of kisses along the line of John's collarbone, Ianto trails his hand to cup him in hand, caressing, the touch of his hand teasingly light before he wraps his fingers back around his arousal to offer him another firm encouraging stroke again.

"Say it again," he murmurs roughly, moving his other hand up to tangle in the other man's hair.