"Is that what we are using for communication now? Chemist's code? It's lab monkey work, you know? Chemistry. Always thought that. It can be rather useful, mind, but still. Not much art to it." At least to the precise approach. He supposed the Joker made it a bit of an artform. A deadly art, but still.

"Why shouldn't I always want attention? Everyone tells me it's a sickness, I consider it a logical consequence of having any kind of awareness and being me. Why would I not want people to witness my genius?" Seemed as if he'd be depriving them if he didn't demand focus. "Anyway, you like it. You like giving me attention. You enjoy the results it can get you. Shall I use the language you understand?"

He ran his fingers through Jonathan's hair, combing back the dark strands that stuck to his forehead. He looked into his eyes, drowning in the true blue. "It's no longer just dopamine, norepinephrine, and serotonin, is it?"

Pulling on his hair, he forced Jonathan to lean his head back, chuckling. "Oxytocin and vasopressin, because you've grown attached by now. Does that ever scare you, Doctor Crane? I wonder."

He doubted that Jonathan was lucid enough to engage much with it right now, but at least he was looking at him. "You like me. Scary stuff."