I hear my sister-in-law calling from the bathroom: “Help! I’m trapped and can’t get out!” The poorly fitted door has jammed, and with my brother away on business, I’m the only one home to help her. But when I go to open it, I end up trapped inside too. My brother won’t be back until morning, leaving the two of us alone in the bathroom all night. I know I shouldn’t be thinking such filthy thoughts—but I can’t stop myself...