Create a realistic, detailed image, full shot, head to toes image of a tall, skinny, naked, hung, Mexican twink, standing naked in a classroom, his, long, huge, erect, thick, heavy, uncut, veiny, hairy cock and very low-hanging balls both exposed, a mixture of arousal and slight embarrassment in his expressive eyes. His hands are down, his cock is dripping a lot of precum. He is showing off to someone out of frame.