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It's a clear, pristine midsummer night in the skies over eastern North America, and love is in the air No literally, lovemaking is taking place in the air. The sky is aflutter with the flapping wings of mating eastern red bats.

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Procreating is serious business in the animal kingdom, and Mother Nature has gone out of her way to cleverly ensure the survival of her many, many denizens. From sex organs with multiple heads to prodigious shafts exceeding an animal's own body length, here are 12 of the weirdest and often scariest animal penises on the planet:. But what makes this soft-bodied marine mollusk particularly different is its ability to grow a new penis within 24 hours.

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Every physical characteristic your cat has contributes to survival. The barbs on a male cat's penis are no exception. They help ensure that his genes are passed on through successful mating.

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These spines have been described as being simple, single-pointed structures macaques or complex with two or three points per spine strepsirrhines. Felines, especially domestic cats, are well known for having penile spines. Upon withdrawal of a cat's penisthe spines rake the walls of the female's vaginawhich may serve as a trigger for ovulation.

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Lions have very high copulation rates. The female may mate approximately every 15 minutes when she is in heat for three days and nights without sleeping, and sometimes with five different males. This often leads to physical exhaustion of males when only a one or two are involved.

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The histological preparations were made by Mrs. Marie Tucker. We wish to thank Dr.

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This page has been archived and is no longer updated. Published online 9 March Nature doi Sex would be a very different proposition for humans if — like some animals including chimpanzees, macaques and mice — men had penises studded with small, hard spines.

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At least 12 bat species have prickly genitals. The question is, why would male bats evolve penises that could cause the females pain and damage? The image above looks like a medieval mace: a tubular structure with nasty-looking spikes. But these are no carefully crafted human weapons.

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Male ducks have corkscrew-shaped penises. Female kangaroos have three vaginas. Male rhesus macaque monkeys will " pay " to see female rhesus macaques' bottoms.

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All rights reserved. Men have lost the DNA code that once made human penises spiny, according to a new analysis of the human genome. Penile spines, which are still present in several modern animals, are usually small barbs of keratin—a type of hard tissue—that line the outside of the organ. The prehistoric male enhancement existed in the common ancestor of chimpanzees and humans, which lived about six million years ago, according to the gene analysis.