A muscular 17 year old man with an erect penis half gypsy demon

a muscular 17 year old man with an erect penis half gypsy demon, detailed anatomy,realistic,photorealistic,photo-realistic:1.37,(best quality,4k,8k,highres,masterpiece:1.2),ultra-detailed,vivid colors,physically-based rendering,extreme detail description,professional

worst quality, low quality, bad anatomy, bad hands, bad body, missing fingers, extra digit, fewer digits