Sex will give us the energy we need to finish studying.

"...I can't afford to fall any further behind. We need to finish this chapter at least if we're going to be ready for the exam."

"Fine," she groans as she stands up. "I'll go get us some caffeine."

I manage to catch her hand before she leaves. "Caffeine isn't going to cut it. You circadian rhythm is already out of wack because of our study schedule. Tomorrow, you wouldn't even be able to get out of bed." Now it was time to play my gambit. "You need to have another orgasm."

"What?!"

"It gave you energy before, didn't it? One more orgasm should let us reach a better stopping point than we're at now. And because it's a normal physiological process, it won't disrupt your sleep nearly as much as caffeine would."

She let out an embarrassed laugh before speaking again. "So, I'm just supposed to go into the bathroom and masturbate when I'm feeling tired?"

"Actually, females are much better rejuvenated when they experience intercourse with a partner. And since Pete asleep until morning, I would have to be your partner for you to notice any net benefit."

She glared at me like we'd never met before, and, truthfully, this was a side I'd never shown her. Conniving, dishonest, and completely without compassion. She then glanced at my hand still holding hers and stammered, "You're saying I should have sex with you to improve my studying efficiency?"

I was starting to panic. Even sleep-deprived, she wasn't an ignorant bimbo. I did my best to keep some authority in my voice when I answered. "I'm saying there are worse ways to ensure we learn to be competent doctors."

She pulled her hand away from mine. "According to your theory, wouldn't your studying be adversely affected by having sex with me? Just like what happened to Pete?"

Oops. I hadn't considered that angle.