It’s a Guy Thing
Only the males sing, which has led many scientists to theorize that they croon to attract females. The hole in this argument, though, is that no one has ever seen a female whale show any interest in a male’s song.
Just because women show no interest doesn’t mean a guy isn’t doing it in the hopes of getting laid*. We just assume they’re playing hard-to-get.
*according to the Michael-from-The-Big-Chill hypothesis
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