The Doctor took a quick, rather shaky breath. "I'm sure." Oh god, was he sure! He'd wanted it ever since... ever since he'd first set eyes on the Master here.
Whether he ought to do it was another matter, of course. But it was worth a try, to see if perhaps giving in to his longing might get it out of his system.
His fingers curled round the Master's jaw at the kiss, and he shuffled in a bit closer. "Thank you," he said softly, pressing a soft kiss to the Master's lips.