He knows what you are - He knows you’re a demon sent up to tempt weak minds into a path of sin and debauchery. He knows that is exactly what you’re doing to him - cooing sugar-coated words into his ear paired with lingering touches and longing gazes.

Hence his annoyance with your continued insistence on a pact. He’s not anywhere near stupid enough to make a pact with a demon like yourself, a pact that would enable you to have far more control over him than he’d like. Just because you happen to be gorgeous doesn’t make it any less annoying that you’re following him around like a lost puppy.

He sighs out a thick plume of smoke as you follow him around his apartment, still trying to convince him that he’d benefit from this deal. “I’m not taking your bloody deal, savvy? Bugger off and go try to finesse some other poor man,” he all but groans, rubbing the bridge of his nose.