Fully agree Amy. Lets make too examples:
Sex in the dark (so called mole sex)
Hiding: Making out already, then switching lights off, having sex, switch lights back on
Not hiding: Going to bed, switch lights off, get in the mood, have sex, clean up, go to sleep
Sex under blanket (so called blanketboy sex or simply "Kenny")
Hiding: Always nervously dragging blanket over yourself making sure not an inch skin will show
Not hiding: Lying under blankets in bed together, get in mood, have sex under blankets but dont care about them, usually they fall off pretty soon.