Ultra photorealistic full-body shot of a slim young woman with light-brown hair loosely tied up in a messy updo, fair smooth skin, straddling a man who is lying on his back on a white surface, her legs spread wide in a cowgirl position, looking down with a soft open-mouthed expression, both hands placed on the man’s chest, the man’s erect penis deeply inserted into her vagina, the man with short brown hair and a tattoo on his upper left arm lying with his head toward the bottom of the frame, both completely nude, soft even studio lighting against a plain muted gray background, highly detailed skin texture, realistic body proportions, natural soft shadows, sharp focus, artistic nude photography style, 8k, extreme detail