"I don't want you to stop," he says, shaking his head rapidly. "I just...I wasn't...expecting such a strong...reaction..."

He shifts his eyes to her face, and there is a dark, nearly feral look in them. It is not a dangerous expression, but simply one that is on the edge of 'wild', a little darker and thicker with lust than what she may have seen from him before.

"I was afraid...if I growled with pleasure...I would scare you. And I don't want you to stop."

As soon as he says what he is thinking, part of his brain clearly realizes just how stupid it sounds.