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In evolutionary psychology, people often speak of the four Fs which are said to be the four basic and most primal drives (motivations or instincts) that animals (including humans) are evolutionarily adapted to have, follow, and achieve: fighting, fleeing, feeding and mating (a more polite synonym of the word "fucking"). [1]
Instinct is the inherent inclination of a living organism towards a particular complex behaviour, containing innate (inborn) elements.The simplest example of an instinctive behaviour is a fixed action pattern (FAP), in which a very short to medium length sequence of actions, without variation, are carried out in response to a corresponding clearly defined stimulus.
Under natural conditions, sows will leave the herd and travel up to 6.5 km (4.0 mi) [6] a day prior to parturition in order to find the appropriate spot for a nest. [8] The sows will use their forelimbs and snouts in order to create excavated depressions within the ground and to gather/transport nesting materials. [9]
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
Animal ability to process and respond to stimuli is correlated with brain size. Small-brain animals tend to show simple behaviors that are less dependent on learning than those of large-brained animals. Vertebrates, particularly mammals, have larger brains and complex behavior that changes with experience.
Female sexual arousal. On the left, the female genitalia are in regular state. On the right, the female is sexually aroused, the vulva is wet and its labia are slightly engorged. Erection of nipples; Vaginal lubrication; Vasocongestion of the vaginal walls; Tumescence and erection of the clitoral glans and labia; Elevation of the cervix and uterus
The female fruit bat performs fellatio on a male fruit bat during copulation to increase overall copulation time. Although fellatio is a common human foreplay activity, it is less common among non-human animal species. At this point, it is unclear exactly what neurological forces motivate fruit bats to engage in fellatio during sex, although ...
Communication is important for animals throughout the animal kingdom. For example, since female praying mantids are sexually cannibalistic, the male typically uses a cryptic form of display. [2] This is a series of creeping movements executed by the male as it approaches the female, with freezing whenever the female looks towards the male.