Ultra photorealistic close-up of a man standing and penetrating a woman from behind, his thick erect penis deeply inserted into her vagina, one hand firmly gripping the base of his shaft, the woman’s round buttocks fully visible and slightly raised, soft fair skin with natural texture, both bodies partially shown from the hips down, soft even studio lighting against a plain bright white background, highly detailed skin texture, realistic veins and moisture, natural soft shadows, sharp focus on the penetration, artistic nude photography style, 8k, extreme detail