Nature's strangest SEX rituals, 明らかにする／漏らすd - from echidnas with four-長，率いるd penises to 白人指導者べったりの東洋人 slugs that can mate with themselves
- GRAPHIC CONTENT WARNING MailOnline looks at nature's weirdest sex stories
- READ MORE:?Bat uses its penis as an 'arm' during sex?which can last 12 hours
From voyeurism to fetishism, many people have unusual sex kinks they'd love to fulfil.?
But these preferences pale in comparison to many creatures in the animal kingdom, who have some downright bizarre sex rituals.?
This week, scientists 明らかにする／漏らすd how male serotine bats use their 大規模な phallus as an 'extra arm' during romps that can last up to 12.7 hours.
一方／合間, 女性（の） praying mantises brazenly devour the male?during or after the mating 過程.
Here, MailOnline looks at the most unusual sex rituals in the animal kingdom.?
From the echidna with a four-長，率いるd penis to 白人指導者べったりの東洋人 slugs that can mate with themselves, here's some of nature's weirdest sex stories?
SHORT-BEAKED ECHIDNA
The 称する，呼ぶ／期間／用語 'four-長，率いるd monster' isn't just consigned to horror stories.
In fact, you can find one on the male short-beaked echidna (Tachyglossus aculeatus) from Australia.?
Although most famous for its spines and long snout, the 哺乳動物 has a 'very long' and 有望な red phallus that makes up a third of its 団体／死体 while 築く.
What's really special about this member is it has four endings or '長，率いるs', all of which can be used for reproduction with the 女性（の）.?
But it gets weirder; when the echidna has sex, two of the four 長，率いるs are engorged while the others are flaccid.
What's more, the 女性（の） has two separate reproductive tracts which take a penis 長，率いる each during sex.
Having four 長，率いるs on the penis may be to please the 女性（の）, who scientists believe may mate with up to a dozen males while ovulating.?
Photos of the creature's apparatus are not for the faint-hearted ? and one particular male looks dead chuffed with what he's got.?
The echidna is native to Australia, has spiky pines, a bird-like beak, a pouch like a kangaroo and also lays eggs.
The 'very strange and unusual' echidna penis remains a mystery to 研究員s who still don't understand why it has four 長，率いるs?
READ MORE Male bats secrete saliva, faeces, urine and semen to attract 女性（の）s
Pictured, a male?long-nosed bat during the mating season
In 事例／患者 you 手配中の，お尋ね者 more 利益／興味ing sex facts about the male short-beaked echidna, its 実験（する）s are 内部の (they never descend) and it has no scrotum.
Also, when not in use, the penis is 蓄える／店d internally and their ejaculate 含む／封じ込めるs bundles of up to 100 sperm that swim cooperatively until they reach the egg.
In most other 種類, sperm swim 個々に and it’s every sperm for themselves.
PRAYING MANTIS
かもしれない one of the most famous ? and extreme?? 性の practices comes 儀礼 of the praying mantis, the ruthless predatory insect.?
The bigger adult 女性（の） devours the male during or after the mating 過程, to give its offspring a source of 栄養 as it develops.??
いつかs the 女性（の） 部分的に／不公平に eats the male before he even 開始するs her ? but rather than considering this a 性の faux pas, the male carries on regardless.
'In this 事例／患者, the headless wonder swings his 脚s around until his 団体／死体 touches hers, climbs の上に her 支援する, and copulates as though nothing were amiss,' 令状s behavioral ecologist Marty Crump.?
In this photo, taken at Brenne 地域の nature park in フラン, a 女性（の） praying mantis eats the male just after the coupling. This behaviour is ありふれた 特に when 女性（の） is 餓死するd
Picture d, a 女性（の） South African mantis (Miomantis caffra) 見本／標本 laying her eggs. The 種類 is a moderately sized mantid with one of the highest known 率s of pre-copulatory cannibalism. More than 60 per cent of 性の interactions end in males 存在 消費するd, mostly without mating
Some of the most 勇敢な mantis males?格闘する with their 女性（の） mate in an 試みる／企てる to 避ける 存在 eaten ? resulting in a violent and 劇の struggle.??
There are more than 2,400 different 種類 of mantises, or mantodea, who have been given the 付加 'praying' 予定 to its 祈り-like posture.
Around 90 per cent of the predatory 種類 of mantises show 性の cannibalism, によれば a 2009 paper.?
ORB-WEB SPIDER
Another?sexually cannibalistic 種類 is the orb-web spider (Nephilengys malabarensis), but the male has an ingenious 解答 to help it 生き残る.?
Its sperm-transferring 組織／臓器s called 'palps' ? 位置を示すd on the 味方する of its 長，率いる and analogous to penises ? can be detached from the 残り／休憩（する） of its 団体／死体.?
It means the male spider can leave its penis to finish?inseminating the 女性（の） while making its 出口, 減ずるing the 見込み of it 存在 killed.?
This form of 'remote copulation'?増加するs the total 量 of sperm transferred, and is thought to 上げる chances of the male becoming a father.?
Pictured, an orb-web spider 女性（の） with a 厳しいd male palp (in red) still 宿泊するd in her 性の 組織／臓器s. The smaller, half-eaten mate is to the left
Salamanders will walk nine MILES for sex - read more
研究員s looked at the endurance of two types of mole salamanders
?
An 追加するd 特別手当 of the detachable penis is it will 'serve as a plug' to 妨げる other males from mating with the 女性（の）, a 2012 熟考する／考慮する said.
Losing its maidhood also means it 重さを計るs いっそう少なく, which makes it more agile and able to fend off other males.?
BANANA SLUG
白人指導者べったりの東洋人 slugs ? 指名するd in 承認 of their 有望な yellow colour?? are hermaphroditic, meaning they have both male and 女性（の） reproductive 組織／臓器s.
They usually cross-mate, with both slugs 配達するing sperm and laying eggs, but in rarer 事例／患者s they?even fertilise themselves.?
Two 白人指導者べったりの東洋人 slugs will also engage in an (a)手の込んだ／(v)詳述する courtship dance, where the circle each other, プロの／賛成のd each other with their tails and nibble at each other's 団体／死体s.
They 結局 intertwine before intercourse begins, which can take?several hours as the two take turns?transferring sperm from one to the other.
A 白人指導者べったりの東洋人 slug's male genitalia can be as long as its entire 団体／死体, making its penis-to-団体／死体 割合 one of the largest known to scientists.?
白人指導者べったりの東洋人 slugs usually cross-mate, with both slugs 配達するing sperm and laying eggs, but in rarer 事例／患者s they even fertilise themselves
Male 白人指導者べったりの東洋人 slugs must choose their mate carefully because if the 女性（の） is too small their penis might get stuck.
Unable to pull out afterwards, the only 選択 left is to bite off the other slug's reproductive 組織／臓器.
PORCUPINE
Porcupines are into what can only be 述べるd as a very niche 性の fetish.??
It 伴う／関わるs the male drenching the 女性（の） in urine from around seven feet (two metres) away.
If she is not ready to mate, she shakes off the urine and leaves.?
Porcupines?are into what can only be 述べるd as a very niche 性の fetish 伴う／関わるing urine (とじ込み／提出する photo)
But if it turns her on and she is impressed with his pheromones, then they will mate, and she won't let him stop until he's 肉体的に exhausted.
When that happens, the insatiable 女性（の） finds another prickly partner with a 十分な bladder.
Perhaps unsurprisingly, porcupine sex is very rare as 女性（の）s are only receptive to 性の 前進するs for between eight and 12 hours per year.
You may imagine that porcupine sex would be a prickly 事件／事情／状勢 予定 to their sharp spines, but in fact, both animals relax their spines to 避ける 傷害.
ANGLERFISH
深い-sea anglerfish take 性の intimacy to the next level by 'fusing' 団体／死体s with their partners when they mate.?
In an amazing show of 性の submission, the smaller male anglerfish becomes 永久的に 大（公）使館員d to the 比較して gigantic 女性（の）.
This results in their tissue fusing and the two animals 設立するing a ありふれた 血 循環／発行部数 system, a 2020 熟考する／考慮する 設立する.?
In this photo, it's 平易な to 行方不明になる the male anglerfish 大（公）使館員d to the much bigger 女性（の）. Look at her belly, に向かって the 底（に届く） of the photo
The male becomes 完全に 扶養家族 on the 女性（の） for nutrient 供給（する）, like a developing fetus in the womb of a mother ? a 過程 called '性の parasitism'.?
In an incredible 陳列する，発揮する of charity from the 女性（の）, the male 供給（する）s sperm to his mate while 同時に receiving these nutrients.?
最終的に, what seems weird to us about another animal's erotic practices comes from thousands of years of 進化 ? and?it's 価値（がある） 耐えるing in mind that we're not so normal ourselves.?
Humans are one of the few 種類 that have sex for 楽しみ and 強調する／ストレス 救済, and to 設立する emotional 関係s with each other.
Our penchant for bizarre 性の fetishes ? from bondage to voyeurism and feede rism ? also really 始める，決めるs us apart.?
