Pretending to be experienced in sex, she's shocked when her older sister treats him like a virgin. Confident at first, he soon learns what it's like to be on the receiving end. Under her guidance, he awakens to the pleasure of being dominated—slow thrusting, rapid-fire pounding, cowgirl position orgasm denial—drawn deeper into aggressive, uncharted erotic torment he's never experienced before. His hidden masochistic nature blossoms, transforming him into someone who can't climax unless tormented.