Pelvic thrust

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The pelvic thrust is the thrusting motion of the pelvic region, which is used for a variety of activities, such as dance or sexual activity.

Contents

Sexual activity and innuendo

The pelvic thrust is used during copulation by many species of mammals, [1] [2] [3] including humans, [4] or for other sexual activities (such as non-penetrative sex). In 2007, German scientists noted that female monkeys could increase the vigor and amount of pelvic thrusts made by the male by shouting during intercourse. [5] In whitetail deer, copulation consists of a single pelvic thrust. [6]

Dance

Elvis Presley performing Jailhouse Rock Elvis Presley Jailhouse Rock2.jpg
Elvis Presley performing Jailhouse Rock

One of the first to perform this move on stage was Elvis Presley, which was quite controversial due to its obvious sexual connotations. Due to this controversy, he was sometimes shown (as seen on his third appearance on The Ed Sullivan Show ) from the waist up on TV. [7] Later, the pelvic thrust also became one of the signature moves of Michael Jackson. [8] Twerking, a reverse and sometimes passive form of pelvic thrust dance move, is also a very popular form of hiphop dance moves. The sideways pelvic thrust is a famous female dance move in India and Bangladesh and known as thumka. It appears in the lyrics of various Bollywood songs.

Infants

Pelvic thrusting is observed in infant monkeys, apes, and humans. These observations led ethologist John Bowlby (1969) to suggest that infantile sexual behavior may be the rule in mammals, not the exception. Thrusting has been observed in humans at eight to 10 months of age and may be an expression of affection. Typically, the infant clings to the parent, then nuzzles, thrusts, and rotates the pelvis for several seconds. [9]

See also

Related Research Articles

Primate An order of mammals

A primate is a eutherian mammal constituting the taxonomic order Primates. Primates arose 85–55 million years ago first from small terrestrial mammals, which adapted to living in the trees of tropical forests: many primate characteristics represent adaptations to life in this challenging environment, including large brains, visual acuity, color vision, altered shoulder girdle, and dextrous hands. Primates range in size from Madame Berthe's mouse lemur, which weighs 30 g (1 oz), to the eastern gorilla, weighing over 200 kg (440 lb). There are 190–448 species of living primates, depending on which classification is used. New primate species continue to be discovered: over 25 species were described in the first decade of the 2000s, and eleven since 2010.

Missionary position

The missionary position or man-on-top position is a sex position in which, generally, a woman lies on her back and a man lies on top of her while they face each other and engage in vaginal intercourse. The position may also be used for other sexual activity, such as anal sex. It is commonly associated with heterosexual sexual activity, but is also used by same-sex couples.

Lesser bushbaby

Lesser bushbabies, or lesser galagos, are strepsirrhine primates of the genus Galago. They are classified, along with the bushbabies and the rest of the galagos, in the family Galagidae. They are probably the most numerous primate in Africa, and can be found in every large forest on the continent, inhabiting forested areas, savannas, riverine bush and open woodlands.

Catarrhini Parvorder of Old World monkeys and apes

The Catarrhini, catarrhine monkeys or Old World anthropoids are the sister group to the New World monkeys, the Platyrrhini. The Platyrrhini emerged within "monkeys" by migration to South America from Afro-Arabia, likely by ocean. With respect to the ones that stayed behind, Geoffroy in 1812 grouped the apes (Hominoidea) and the Cercopithecoidea together and established the name Catarrhini, "Old World monkeys",. Darwin in the late 19th century imagined correctly that apes were the sister to the Cercopithecoidea. There has been some resistance to directly designate apes as monkeys despite the scientific evidence, so "Old World monkey" may be taken to mean the Cercopithecoidea or the Catarrhini. That apes are monkeys was already realized by Georges-Louis Leclerc, Comte de Buffon in the 18th century. The apes are further divided into the lesser apes or gibbons and the great apes, consisting of the orangutans, gorillas, chimpanzees and humans. The Catarrhini are all native to Africa and Asia. Members of this parvorder are called catarrhines.

Prosimian

Prosimians are a group of primates that includes all living and extinct strepsirrhines, as well as the haplorhine tarsiers and their extinct relatives, the omomyiforms, i.e. all primates excluding the simians. They are considered to have characteristics that are more "primitive" than those of simians.

Personal grooming

Grooming is the art of cleaning and maintaining parts of the body. It is a species-typical behavior.

Spider monkey A genus of mammals belonging to the New World monkeys

Spider monkeys are New World monkeys belonging to the genus Ateles, part of the subfamily Atelinae, family Atelidae. Like other atelines, they are found in tropical forests of Central and South America, from southern Mexico to Brazil. The genus contains seven species, all of which are under threat; the black-headed spider monkey and brown spider monkey are critically endangered. They are also notable for their ability to be easily bred in captivity.

Baculum

The baculum is a bone found in the penis of many placental mammals. It is absent in the human penis, but present in the penises of other primates, such as the gorilla and chimpanzee. The os penis arises from primordial cells within soft tissues of the penis, and its formation is largely under the influence of androgens. The bone is located above the male urethra, and it aids sexual reproduction by maintaining sufficient stiffness during sexual penetration. The homologue to the baculum in female mammals is known as the baubellum or os clitoridis, a bone in the clitoris.

Animal sexual behaviour Sexual behavior of non-human animals

Animal sexual behaviour takes many different forms, including within the same species. Common mating or reproductively motivated systems include monogamy, polygyny, polyandry, polygamy and promiscuity. Other sexual behaviour may be reproductively motivated or non-reproductively motivated.

Monogamous pairing in animals refers to the natural history of mating systems in which species pair bond to raise offspring. This is associated, usually implicitly, with sexual monogamy.

A pseudo-penis is any structure found on an animal that, while superficially appearing to be a penis, is derived from a different developmental path.

Penis primary sexual organ of male animals

A penis is the primary sexual organ that male animals use to inseminate females during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males do not bear a penis in every animal species, and in those species in which the male does bear a so-called penis, the penises in the various species are not necessarily homologous.

Mating plug gelatinous secretion used in the mating of some species

A mating plug, also known as a copulation plug, sperm plug, vaginal plug, sement or sphragis, is gelatinous secretion used in the mating of some species. It is deposited by a male into a female genital tract, such as the vagina, and later hardens into a plug or glues the tract together. While females can expel the plugs afterwards, the male's sperm still gets a time advantage in getting to the egg, which is often the deciding factor in fertilization.

Nest-building in primates

Nest-building in primates refers to the behaviour of building nests by extant strepsirrhines and hominid apes. Strepsirrhines build nests for both sleeping and also for raising families. Hominid apes build nests for sleeping at night, and in some species, for sleeping during the day. Nest-building by hominid apes is learned by infants watching the mother and others in the group, and is considered tool use rather than animal architecture. Old World monkeys and New World monkeys do not nest. It has been speculated that a major evolutionary advance in the cognitive abilities of hominoids may first have occurred due to the development of nest-building behaviour and that the transition from nest-building to ground-sleeping led to "modifications in the quality and quantity of hominid sleep, which in turn may have enhanced waking survival skills through priming, promoted creativity and innovation, and aided the consolidation of procedural memories".

Female copulatory vocalizations, also called female copulation calls or coital vocalizations, are produced by female primates, including human females, and female non-primates. Copulatory vocalizations usually occur during copulation and are hence related to sexual activity. Vocalizations that occur before intercourse, for the purpose of attracting mates, are known as mating calls.

Penile spines

Many mammalian species have developed keratinized penile spines along the glans and/or shaft, which may be involved in sexual selection. These spines have been described as being simple, single-pointed structures (macaques) or complex with two or three points per spine (strepsirrhines). Penile spine morphology may be related to mating system.

Non-reproductive sexual behavior consists of sexual activities animals participate in that do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. Animals have been observed to engage in sex for social interaction, demonstration of dominance, aggression relief, exchange for significant materials, and sexual stimulation. Observed non-procreative sexual activities include non-copulatory mounting, oral sex, genital stimulation, anal stimulation, interspecies mating, and acts of affection. There have also been observations of animals engaging in homosexual behaviors, as well as sex with dead animals and sex involving juveniles.

Human sperm competition

Sperm competition is a form of post-copulatory sexual selection whereby male ejaculates simultaneously physically compete to fertilize a single ovum. Sperm competition occurs between sperm from two or more rival males when they make an attempt to fertilize a female within a sufficiently short period of time. This results primarily as a consequence of polyandrous mating systems, or due to extra-pair copulations of females, which increases the chance of cuckoldry, in which the male mate raises a child that is not genetically related to him. Sperm competition among males has resulted in numerous physiological and psychological adaptations, including the relative size of testes, the size of the sperm midpiece, prudent sperm allocation, and behaviors relating to sexual coercion, however this is not without consequences: the production of large amounts of sperm is costly and therefore, researchers have predicted that males will produce larger amounts of semen when there is a perceived or known increase in sperm competition risk. Sperm competition is not exclusive to humans, and has been studied extensively in other primates, as well as throughout much of the animal kingdom. The differing rates of sperm competition among other primates indicates that sperm competition is highest in primates with multi-male breeding systems, and lowest in primates with single-male breeding systems. Compared to other animals, and primates in particular, humans show low-to-intermediate levels of sperm competition, suggesting that humans have a history of little selection pressure for sperm competition.

Copulation (zoology)

In zoology, copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into her reproductive tract. This is an aspect of mating. Many animals that live in water use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes in a liquid medium in the Late Ordovician epoch. Internal fertilization with many vertebrates occurs via cloacal copulation, known as cloacal kiss, while mammals copulate vaginally, and many basal vertebrates reproduce sexually with external fertilization.

Harold Clyde Bingham was an American psychologist and primatologist. He spent his early career as a psychology professor, interrupting this to join the United States Army during World War I. He joined the faculty of Yale University in 1925 and studied under the supervision of Robert Yerkes. Yerkes, a psychology professor, had an interest in primates, and Bingham also entered this field. He led a 1929-30 expedition to the Belgian Congo to study gorillas in the wild. Though hampered by the size of the expedition, Bingham managed to get close to several troops of the animals and record details of their behavior. Upon his return to the United States he joined the Civil Works Administration and the Emergency Relief Administration. Bingham later worked with the National Youth Administration and, during World War II, rejoined the US Army. After the war Bingham served as a senior psychologist with the Veterans Administration.

References

  1. R. D. Estes (1991). The Behavior Guide to African Mammals: Including Hoofed Mammals, Carnivores, Primates . University of California Press. ISBN   978-0-520-08085-0 . Retrieved 28 July 2013. copulation thrusting.
  2. Bruce Bagemihl (15 January 1999). Biological Exuberance: Animal Homosexuality and Natural Diversity. Macmillan. ISBN   978-0-312-19239-6.
  3. A. F. Dixson (26 January 2012). Primate Sexuality: Comparative Studies of the Prosimians, Monkeys, Apes, and Humans. Oxford University Press. ISBN   978-0-19-954464-6.
  4. Nilamadhab Kar, Gopal Chandra Kar (2005). Comprehensive Textbook of Sexual Medicine. Jaypee Brothers Publishers. pp. 107–112. ISBN   8180614050 . Retrieved February 10, 2014.CS1 maint: uses authors parameter (link)
  5. "Study Reveals Why Monkeys Shout During Sex". livescience.com. Charles Q. Choi.
  6. Leonard Lee Rue (3 September 2013). Whitetail Savvy: New Research and Observations about America's Most Popular Big Game Animal. Skyhorse Publishing. ISBN   978-1-62636-531-5.
  7. "Welcome to EIN". Elvisinfonet.com. Retrieved 2013-08-01.
  8. "#HappyBirthdayMJ – Top 5 iconic steps Michael Jackson floored us with". Business Insider . Retrieved 3 April 2017.
  9. Rathus, Spencer: Human sexuality in a world of diversity (2007) p. 314

Bibliography