This educational video explores the physics behind penis penetration, focusing on the force of gravity acting on a erect penis during various sexual positions. The narrator, a stern-looking scientist, demonstrates how gravity affects the angle and depth of penetration in missionary, doggy style, and standing positions. He uses a scale model penis and a custom-built gravitational simulation chamber to illustrate his points. The video features close-up shots of the model penis swaying and bouncing under different gravitational loads, accompanied by detailed diagrams and charts. While informative, the video is also surprisingly arousing due to its clinical yet intimate focus on penises.
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Date: January 8, 2026
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