Humans did n’t invent masturbation . We get the urge because our antecedent did too , even back to the earliest mammal and reptiles . It ’s likely that as soon as animals evolved brain circuitry that made stimulating intimate organs reward , person started taking the opportunity to reward themselves .
The variety of animal that have been caught taking a morsel of alone clock time goes far , far beyond pawl humping legs . Here ’s a sample distribution .
It should be no surprise to anyone that our primate cousins are wiz masturbators . They have hands , after all . The artwork of self - pleasure has been take note in males from about 80 specie from emulator to monkey to lemur , induce it one of the most common and widespread primate intimate behaviors . female person from at least 50 species also get into the act , and they can get creative : for example , female orangutans and capuchin imp have both been observed using sticks and other plant parts as makeshift dildos .

They do n’t have hands , but male and distaff cetaceans – at least in the smaller mintage – manage to masturbate anyway , mostly by rubbing their genitals on thing . The sea flooring , the wall of tanks ( if they ’re in imprisonment ) , other animals , any loyal objects they happen in their environs : it ’s all fair game , though themale bottlenose who reportedly wrapped a live eel around his phallus seems in particular inventive .
onanism ’s been determine in bottlenose and thread maker dolphin , killer hulk , and two types of river dolphin . No one knows whether the bigger whales jack off , or what it ’d see like if they did .
A male Asian elephant has a tenacious , brawny penis that he can move around with a lot of hypertrophied muscle at its base . That lets him sail it into a distaff ’s vagina , or she-bop by repeatedly strike his tumid member against his stomach . Elephants are most concerned in beating themselves when they ’re in the other stage of musth , the season of peak testosterone that leaves them aggressive , dribbling water , and overpoweringly aphrodisiacal to distaff elephants . It does n’t last forever : they lose pursuit as the musth go on .

https://www.youtube.com/watch?v=hVvc3kO3OxI
What is it with the boastful blubbery handless creature ? Male walrus will rub their front flipper over the shaft of their alarmingly gravid penis . Or they ’ll auto - fellate , because it ’s just that big .
Rodents jacklight off , too . During the breeding season , both manful and female porcupines itch sticks against their genitalia . Male Cape ground squirrels masturbate at any time of the twelvemonth , but prevalent males do it most often , paradoxically , flop after they ’ve pair . University of Manitoba biologist Jane Waterman , who first quantify this behavior , suggests that because the male person and females have many mate over the breeding period , jerking off immediately after sex might keep male person from picking up and spreading sexually transmitted infections .

Young manlike lamia squash racquet and male yield squash racket ( as in this video ) have both been reckon pleasuring themselves with their tongues . Typically , an animal will groom and lick his penis , sometimes accomplish orgasm . Since they rest hanging upside down by their metrical foot , that can get a minute messy .
Male lizards have a doubled phallus ( their hemipenes ) which move far beyond the fancy glans we see in some marsupials : each one has its own spermatozoan channel , and the animals can utilise them severally – swapping sides each prison term they copulate . Many species also rub their hemipenes against the ground on a regular basis , sometimes daily when it ’s the breeding season .
These turn of rub may have a purpose — one study of the behavior hint that draw off the top bed of hemipenis skin may avail absent any bacterium and parasite the male person break up up during relation , or keep the intricate pelt frill on the surface of the hemipenes well groomed .

For maritime iguanas , masturbation can serve a much more direct reproductive part . All males , great and modest , will try their luck at mating . But large Male are territorial , and ruthless about shove small males off of females mid - copulation long before they ejaculate . For the diminished males , masturbation is a strategy : they finish off on the rocks , ejaculate into their cloacal folds , and store the semen so it ’s ready to press inside a female first thing the next metre they get a hazard to mate . The trick improves their fertilization success by 41 % , and passes the behavior to the next generation .
manlike turtles start masturbating as soon as they ’re sexually mature , pushing their terrifyingly large and ornate organs against arduous objects , sometimes whine with what sound like pleasure . Or mayhap they ’re confused and think that rock and porch steps are unusually unresponsive female turtles .
It ’s the breeding time of year , you ’re a new virile Adélie penguin , and you have n’t been capable to find a unforced mate ? No problem : the plain John Rock of the rookery will do .

The auto - erotic behavior of Adélie penguins was first detect by G. Murray Levick in 1911 during the Scott Antarctic expedition :
Sometimes we ascertain these bird , after walking some distance , apparently in the vain search for hens , stick out motionless and stiff upon the ground , then stiffen themselves , assume the attitude and go through the motions characteristic of the sexual act , in some case actually ejecting their cum on to the dry land .
He found the behavior ( along with the necrophilia , sexual coercion , and chick abuse he observed ) so shocking that he simply bequeath it out of his seminal monograph on the coinage . He wrote up his observations on the sexual habits of the “ hooligan hammer ” on an individual basis , in Greek so that no one other than professional ornithologists would be tainted by the knowledge . The unpublished verbal description was only rediscover a few year ago .

[ Thomsen and Sommer 2015|Morisaka et al . 2013|Norris 1977|Jainudeen et al . 1971|Shadle 1946|Waterman 2010|Greenhall 1965|den Bosch 2001|Wikelski and Baurle 1996|Rit et al . 2010|Russell et al . 2012 ]
Top figure of speech ( primate ) by Kevin Botto viaFlickr|CC BY - ND 2.0 ; Gibbon by Linda Tanner viaFlickr|CC BY 2.0 ; Beluga whales by Brian Gratwicke viaFlickr|CC BY 2.0 ; Asian Elephant by Adhi Rachdian viaFlickr|CC BY 2.0;North American porcupine by Gary Eslinger / USFWS viaFlickr|CC BY 2.0 ; Marine iguana by Lieutenant Elizabeth Crapo , NOAA Corps viaFlickr|CC BY 2.0 ; Adélie penguin by Liam Quinn viaFlickr|CC BY - SA 2.0
connect with the source at[email protected ] .

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