Follow that line of thought.
From Create Your Own Story
"What's that supposed to mean?" You ask.
"That our plumbing matches," she says, shrugging. "I mean, for all we know we're the only two people not sick. We might have to repopulate." She widens her eyes and looks at you for your reaction. When you blankly stare, hanging on the words, she chuckles. "I'm just fucking with you. You're a dude. I'm a girl. You're not a bad looking guy and from the way you stare at me, I figure you think I'm fuckable. So we're attracted to each other. That's a good start. We'll get thirsty, hungry, and horny along the way. We're human, right?"
