Penis shape not size matters most to mice

By Belinda Tasker
Updated July 11 2018 - 11:01am, first published 10:59am
Male mice who face competition when it comes to mating tend to have thicker penis bones.
Male mice who face competition when it comes to mating tend to have thicker penis bones.

Penis shape matters more than size when it comes to the mating rituals of mice, Australian scientists have discovered.

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