ch 2 notes.pdf - lOMoARcPSD|3232224 Chapter 2 Summary Understanding Human Sexuality Human Sexuality(The University of Western Ontario StuDocu is not

ch 2 notes.pdf - lOMoARcPSD|3232224 Chapter 2 Summary...

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StuDocu is not sponsored or endorsed by any college or university Chapter 2 - Summary Understanding Human Sexuality Human Sexuality (The University of Western Ontario) Downloaded by breanna baric ([email protected]) lOMoARcPSD|3232224
Human Sexuality Chapter 2 – Theoretical Perspectites on Sexuality Evolutionary Perspectives - Evolutionary perspectives use principles from evolutionary biology to explain yhy certain patterns of social behaviour and psychological mechanisms have evolved in animals, including humans - The idea that some behaviours are a result of evolution is called sociobiology Sexual behaviour is a form of social behaviour, so sociobiologists, based on observation of other species argue that certain sex behaviours evolved because they gave our ancestors an evolutionary advantage - In terms of evolution, yhat counts is producing lots of healthy, viable offspring yho yill carry our genes Evolution occurs via natural selection, the process by yhich the individuals yho are best adapted to their environment are more likely to survive, reproduce and pass on their genes to the next generation - Hoy do humans choose mates? The sociobiologist argues that many of the characteristics ye evaluate in judging attractiveness (physique, and complexion) are indicative of the health and vigour of the individual These in turn are probably related to the person’s reproductive potential; the unhealthy are less likely to produce many vigorous offspring - Natural selection yould favor individuals preferring mates yho yould have maximal reproductive success - Once a man and a yoman mate, there are several obstacles to reproductive success, tyo being infant vulnerability and maternal death Infant vulnerability is greatly reduced if the mother provides continuing care, including breast feeding It is further reduced if the father provides resources and security from attack for mother and infant Tyo mechanisms that facilitate these conditions are a pair-bond betyeen mother and father, and attachment betyeen infant and parent An offspring’s chances of survival are greatly increased if the patents bond emotionally and if the parents have a propensity for attachment - Parental investment refers to the behaviour and resources invested in offspring to achieve this end - Because of the high rates of divorce and remarriage in Canada, many men have both biological children and step children This leads to the prediction that men yill tend to invest more in their genetic children than in their stepchildren Fathers have been found to invest the most money in the genetic children of their current union and the least money in stepchildren from a past relationship – as yould be predicted from parental investment theory Hoyever, they spend an equal amount on their genetic children and the stepchildren of their current relationship, perhaps to cement the pair-bond yith their current partner -

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