"Extra credit?" Darl asked, grinning with amusement. "Well, in that case, perhaps I should attempt it."
He paused. "On second thought, perhaps not. I'm not terribly stealth. I'd imagine you'd see me."
He rather thought himself to be quite funny.
"Until my arms get tired," he reasoned, voice tinged with amusement. "Though I'm not sure when that would be," he said, genuinely answering her question. "I don't give extended massages very often."
Or at all really, but she seemed to be appreciating it. He started to move his hands further down her back, pressing his hands into the muscles.