Before starting on Monday, Glen put two adhesive pads on Autumn's upper chest and ran wires from them to a recording device near his audio equipment.

"What are these for?"

"So, I can shock you when you mess up," he told her.

"Right. What are they really for?"

"I'm recording baselines of your heart rate and breathing."

"For what?"

"Next week you're going to need to be aroused most of the time. By knowing what your baselines are, I can monitor your state of arousal. It isn't perfect, but it's better than nothing."

"Why do you need to know that?"

"Our voices, among other things, change when we're aroused. After...