Under the dim glow of streetlamps, a car's engine purrs, matching the rhythm of its occupants. A woman straddles her lover in reverse, her back to him, riding him with abandon. His hand comes down hard on her cheek, a red imprint blooming. She gasps, her pace quickening, her body craving more. The car bounces, their bodies slapping, the scent of sex and exhaust filling the air.