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Fun fact – the erection happens when blood enters the penis, the main “structure” of the penis hardens and expands (obviously), but by doing so it presses the Veins and blocks them.
Meaning – the blood comes, but doesn’t go out of the organ, thus keeping it hard for long. This is why erections over 6 hours are dangerous because the blood blockage is for too long time and penis can die due to lack of oxygen. I hope it was interesting.
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