"Yeah?" She slid her hand further down, careful as she moved to fondle his balls. "Why don't you show me?"

Because passive wasn't her style. She didn't like to be passive and she didn't want any of her lovers to be passive. Especially not one that could give as good as she could. She leaned in and nipped at his right shoulder, biting a little harder as she tapped just behind his balls. There was a spot there that was her 'instant turn a guy to mush' button. Or, that's what she called it in her head. She was curious how he'd react to it.