The Forgotten Ape, primatologist Frans de Waal , a professor of psychology at Emory University in Atlanta, says that such expressions of intimacy are consistent with the homosexual behaviour of what he terms "the erotic champions of the world". Being that animals have the brain reward system they are motivated to perform in different ways by desire and reinforced by pleasure. Researchers observed that the longer and higher number of pelvic thrusts , the longer copulation lasted. An affectionate activity can be as simple as licking. The mechanism of core pleasure reaction is significantly important for animals and humans.
Engaging in homosexual behavior may allow species to obtain benefits such as gaining practice, relieving tension, and experiencing pleasure. The lab rat learned the action needed to be fed. Culture, Backlash, and the Struggle for Gay Freedom. Autoeroticism also occurs widely among animals, both male and female. It does not need awareness, but it does seem to work on a reward system. Non-penetrative genital stimulation is very common throughout the animal kingdom. Most were known from laboratory experiments, but field observations had also been made. For them, homosexuality is not an issue. Although easily confused by laypeople, autofellatio and oral sex are separate, sexually oriented behaviors, distinct from non-sexual grooming or the investigation of scents. Chimpanzees have full mouth-to-mouth contact, and bonobos kiss with their mouth open and mutual tongue stimulation. Affectionate behaviors do not include penetration or genital rubbing, but are still seen as a manner of sexual behavior. Different forms of self and partner genital stimulation have been observed in the animal kingdom. Researchers stated that after primates participated in a heated, physical fight; both primates involved in the fight would hug and have a mouth-to-mouth kiss. This organ is present in the females of all mammalian species and several other animal groups. Copulation-like contact between immature bonobo males and mature female bonobos increases with age and continues until the male bonobo has reached juvenile age. It has been observed in mammals, birds, reptiles and frogs. If a smooth pebble is introduced into the hutch, she will masturbate upon it, thus preserving her normal health for one season. Homosexual pairing can occur different ways, one example would be two female animals with offspring coming together and helping each other raise their offspring. As of , the scientific literature contained reports of homosexual behavior in at least wild species. Bonobos are one species notoriously known for using sexual behavior to relieve their aggression with each other. In contrast, adult gorillas do not show any sexual interest in juvenile or infant members of their species. It seems to infuse everything from simple expressions of affection to the establishment of dominance. An affectionate activity can be as simple as licking. Being that animals have the brain reward system they are motivated to perform in different ways by desire and reinforced by pleasure. Infants in bonobo societies are often involved in sexual behaviour. He eventually turned to her ten-month-old cub, repeatedly mounting and ejaculating on it. Unlike other primates aggression is substituted with sex.
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