Xavier heard the purr of pleasure which made him purr more himself. Suckling Ketsueki like he was the tastiest lolipop in the world. Squeezing his throat even tighter and at the same time makes purring noises. He bobbed his head up and down while each time he was up he licked the underside and between the tip of the head. His head then bobbing back down. He fondled Ketsueki's balls again. Rubbing and massaging them like treasured jewels. He was careful not to hurt the sexy demon. He felt the man's hand on his hair. Felt him playing with his strands. He liked the feeling of that. He dragged his teeth up the penis again as he bobbed up again. Then pushed back down and sucked harder. Squeezing his throat around Ketsueki again. He could still taste the mans pre in his mouth. He wanted more. He wanted to taste the full extent of Ketsueki's pleasure. So he would keep up pleasuring the man until he was able to get that.