"That's right. I'm all about making things easier on my mortal masters," he said with a sneer. It wasn't like they could say it properly anyway. There was something about the english tongue that was so...barbarian.
He followed her to the counter but stayed on his own side, pressing his hands against the wooden countertop as he looked down at her. "I do accept other things but souls are by far easier to attain. People don't really value it as much as they should it's all about wanting what they want, when they want it and that is usually right now. They don't think about the future and where they could end up. I'm sure you have some concept of Hell. Of course whatever you mortals think, it's actually far far worse," his eyes darkened slightly. It wasn't a pleasent place. Even for him who had spent thousands of years there, it was still hard. He would rather not go back if he had a choice.
His attention was drawn to some knick knacks by the counter as he continued. "The process of signing over your soul is very simple. Deceptively simple and pratically unbreakable. We make the agreement which says that upon your death you go into service. I am a peon for a greater demon so you would be in service to him."
His gaze turned back to her and gave her a leecherous grin. "I'm sure you'd make a lovely succubus. After all you have enough pratice don't you?"