Julian smirked as he looked up from the stack of papers he was grading at the boy seated on the couch next to him. A hard, leaking cock was poking up into the air. A gentle humming was muffled by his body sitting onto the toy that had been teasing him for about an hour now. His hands were tied off behind his back, so he could only watch as his cock drooled and twitched.
Julian smiled. "But if you cum, I lose this fantastic sight of you all desperate and horny like this," he said before swiping his thumb over Todd's cockhead, sucking the sweet, syrupy precum off the end of his thumb. He jerked his hand up and down Todd's length a few times, to test exactly how close to the edge he was. He listened for every hitch and gasp in Todd's response to being touched. That way he didn't let him get over the edge without permission.
"That's an awful big loss to me so that you can cum. I was planning to do this for at least another two hours. I have a lot of grading to do. What do I get for letting you cum?" The negotiation had begun anew. The first two times Todd asked, Julian had flatly refused. The third time they'd negotiated, but Todd failed to satisfy Julian's interest and so he was rejected. Maybe the fourth time would be the charm?