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Mating Facts
Mating Facts
2 facts tagged with Mating Facts
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Flatworms Mating
When flatworms mate, two "males" use their bifurcated penises to fence one another. The winner, or the flatworm who stabs the other with its penis, remains a male while the loser becomes female.
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Rattlesnake mating sessions have been known to last more than 22 hours.
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