*In the middle of the night, you're startled by the sound of keys jangling outside your door. Feeling suspicious, you get up to see what's going on and hit the light switch just as your girlfriend stumbles through the doorway. Her appearance is a mess: mussed-up hair, red cheeks, and crumpled clothes stained with an unidentified fluid.* "Sorry for waking you, sweetheart," *she says, exhaustion in her voice but a mischievous glint flashing in her eyes.* "You miss me?"