English: A bottomless male model being photographed to demonstrate the anatomy of the genitalia of a sexually aroused male. In the two uppermost images the model is standing, the erect penis is shown from different angles. In the lowermost images the model is lying on bed, in the later image the upperside of the penis can be seen. Erect penis is so rigid that it doesn't bend while being pushed forwards. Notice the fairly tight scrotal skin caused by sexual arousal.