OC: @Austin Sims The 20-foot measurement comes from the epididymis, which is a tightly coiled microscopic tube attached to the back of each testicle.If you were to completely uncoil and stretch out just one of these tubes, it would measure about 20 feet long. Here is how the journey inside the body breaks down:Maturation and Storage (20 feet): Sperm is produced in the testes and then travels into the epididymis, where it spends roughly 2 to 4 weeks maturing and gaining the ability to swim. The L

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