"It’s not doing any harm. I already -- it’s easy slipping into his memories." It’s no more dangerous than hosting a part of his soul. "If I’d made slightly different choices I’d have probably ended up a lot like Mars. If I were more ambitious. If I hadn’t been told being Sorted into Slytherin is evil, which is ridiculous. I only believed it because I was eleven myself and I really didn’t wish to end up in the same House as Draco Malfoy. He was a prat. He’s still a prat." Harry snorts, pulling his face out of Sirius’s hands and clasping those hands to bring them down, ignoring the horror growing in the other’s expression.