A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
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A scorpion can hold its breath for up to 6 days.
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The largest breed of rabbit is the Flemish Giant.
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If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
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It has been scientifically proven that stroking a cat can lower one's blood pressure!
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