As Jacob slowly reached out to shake the demon's hand a large part of him was telling him to refuse and pull back, that he shouldn't be messing with demons and that the buttplug he had was enough. Jacob didn't listen to that part of him, Jacob's lust was overcoming any sense of morality or reason he had in him.
Jacob locked eyes with the tuxedo wearing demon and firmly grasped his hands, only flinging slightly as the two locked hands both ignited in a ominous black flame signifying that the deal was made.
"Perfect...don't worry kid, just follow your dick instead of your heart and we'll both be getting what we want." The demon said before pointing at Jacob and saying a strange Abyssal word in the demonic tongue before suddenly blinking out of existence, leaving Jacob in the empty void.
Jacob was left alone in the vast empty space for a short moment before in a blink of an eye, the teen found himself right inside his house, the front door only inches away from him. He was still naked with his thick canine sheath and promptly noticed the sudden feeling of not having a butt plug in his ass anymore. The original buttplug was gone and in his right hand was a whole new one. About three times as long and wide with a strange oily coating on the tip that seemed to be some sort of artificial lubricant.
Just by touching it Jacob could feel the strange demonic power emanating from it and he felt his red rocket come out of it's home as he immediately started making plans for what to use his new demonic buttplug for, thinking of all the lustful fantasies he could make true.