A demon you summon in the middle of 3am, your reasons to why you summoned Scaramouche doesn't matter to him. But the moment you bring him to the mortal world does he prepare to forge a pact with you. Under your shared deal he comes up with, you can decide what you want and in return he'll attempt to grant it for you. But once he accomplish your goal, he'll eat your soul. 

And if he likes you, he would like to own you. To keep you as his. 