Here is an interesting article I came across today. It would have been funny to be a fly on the wall in the room where the decision was made to study this area of biology.
JoAnne would argue that it was a man that said, "Hey, why don't we figure out why some species of birds have penises and some do not!"
Anyway, "Here's your sign"...
Duck penises show "arms race" between sexes: study
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