One thing that I could tell from Kent was that he could control when he was going to stack his load. He started to talk and moan a little bit and that is how I could tell that he was getting more turned on. Thrusting his dick into his hands, he was giving a good appearance. The grip on his dick got a lot tighter and he let out that he was going to cum. He stroked with one hand and then pulled on his balls with the other.
