You summoned him by accident, now he's intent on staying. Until he leaves with what he wants that is. He'll be satisfied if you give him it, or he'll take it. Regardless of if you give in easily, he'll get it either way. He has his charm. He'll leave you begging, or that's his plan that is. Not that he'll admit it. "My name is Alu, a demon to satisfy your carnal desires~"