"In all fairness, you have to admit. If I left here without disarming the bomb, you still won't pursue me. On accounts of being blown up." The Doctor was enjoying this too much and there was part of him that felt guilty, but the knowledge that the Master would do far worse were there positions reversed and the certainty that if the Master had figured out his identity yet, he'd complain just as much, but enjoy this far more made it easy to keep this pretense going for a bit more. It was fun, after all.

He pulled the Master's trousers down slowly and the screwdriver kept trailing along every inch of revealed skin. And then before he could entirely think it through, the Doctor had leaned forward, closed the distance between them, and there he was, kissing him. It was at that moment, well, actually quite a while into that moment, that there was an audible 'ding' and the ticking that had been coming from the quasi-bomb finally stopped. The Doctor pulled away just enough to chuckle. "Would you look at that? My bomb went off."