Men’s fertility could be threatened by chemicals in our environment–especially estrogenic plastics. Scientists examining dead otters in the UK for the last 20 years have noticed a decrease in penis bone weight (but not length).

Despite the slang term "boner," human males don’t have a penis bone, but many other primates do, including gorillas and chimpanzees, and all male rodents have one.

However, human males are still at risk for the same sort of distortion due to the hormone disrupting chemicals called EDCs, which are found in plastic bottles, metal food cans that are lined with plastic, detergents, food, toys, cosmetics, and pesticides.
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