The teen girl, her wrists and ankles bound to the bedposts, writhes in anticipation as her boyfriend looms over her, a wicked grin on his face. He traces the tip of a riding crop along her skin, making her shiver. He flicks her nipples with it, eliciting a gasp, then a moan as he trails it down her stomach, between her legs, and back up again. He brings the crop down hard on her inner thigh, leaving a thin, red line. She cries out, but he can see the desire in her eyes, the way her body responds to the pain and pleasure intermingling.