A photorealistic full-body scene on a tropical beach with fine white sand. A beautiful young woman is completely naked, kneeling on all fours with her back arched and her head turned slightly to the side. She has long, wet, tousled light brown hair with golden highlights that clings to her face, shoulders and back. Her skin is sun-kissed, glowing and slightly tanned, covered in fine wet sand and water droplets that glisten in the sunlight across her back, breasts, hips and thighs. She has a slender, athletic yet soft body with a flat toned stomach, defined waist, full natural breasts and smooth toned legs. Standing closely behind and slightly to the side of her is a tall, muscular dark-skinned man, completely naked. He has a large, thick, heavy flaccid penis. The woman has reached back with one hand and is firmly gripping his penis, her fingers wrapped tightly around the shaft. The background shows a calm turquoise ocean meeting a clear blue sky under bright natural daylight. Highly detailed skin textures, realistic wet skin, sand particles, and natural anatomy, cinematic lighting, sharp focus, 8k, photorealistic.