Tao made a small hum of appreciation before rolling his fingers, stretching him. Licking along his balls, he debated getting a strap to keep him from coming too soon. Pressing his fingers slowly in as he licked along Riley's cock and took him in his mouth, he timed it. His tongue pressed along the underside of his length he sucked down to his base just as he thrust his fingers inside all the way, curled fingers just enough to know he'd hit at least near his prostate. Tao had yet to learn everything about Riley's body and how to get it to react, but he was going to learn all he could.