Affirmation unlocks him. He can admit now in his own mind that he was hoping for this. It'll be something to laugh about with Bunta later, how much he was wanting to be right, anticipating the euphoria of the moment they connected like this.

Once he actually has Marui's lips on his instinct is to take more, keep going but--

"I don't need Keita to find you undressed and on the floor tomorrow," he said wryly, reluctant to pause but feeling the necessity keenly.