Sensations narrowing his focus, Bob picks up on both the gasp and the wince at the same time. His hips still but he's already as far as he can go and it isn't until the goading picks up again that he releases the breath he hadn't realised he'd been holding. There's a brief moment of hesitation, the slightest of looks to double check that John really had meant what he'd said.

Go hard or go home is the message he's getting and since the other man's getting off on it already, he throws whatever uncharacteristic caution he has to the wind and finally does as he's told.

There's nothing slow or gentle about the pace he sets, his hands reaching above John's head so his fingers can grip at the edge of the mattress. And, just like always, he gives it everything he's got.