"Oh, I know. I believe, if nothing else, I know myself better than ever." Barty laughed, leaning in to Regulus' lips, just for the tiniest flick, immediately kissing him after, then kissing him again, because he could. Much better to focus on than the details of what he'd told Regulus already. Was there anything good to say? "I was a professor at Hogwarts. DADA. In disguise, naturally, but still. How grown up am I?"