File:Erection development, male age 33.JPG
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Size of this preview: 800 × 251 pixels. Other resolutions: 320 × 100 pixels | 640 × 201 pixels | 1,024 × 321 pixels | 1,280 × 401 pixels | 2,560 × 802 pixels | 8,270 × 2,592 pixels.
Original file (8,270 × 2,592 pixels, file size: 3.05 MB, MIME type: image/jpeg)