The child remains hers no matter what.
The fact is that, for creatures for whom life is always on the edge, it pays to adult friendship play spread the genes.
They have long necks because of the way they feed.Men are less concerned with reproduction and are less choosy about mates (Wood Eagly, 2002).Men have their own preferences in physical appearance of their mate.Interpersonal aggression and the Type A coronary-prone behavior pattern: A theoretical distinction and practical implications.Yet as Darwin admitted, life isn't just about survival.Evolutionary psychologists and social structural theorists have offered many important theories that explain why males and females are different from each other and in what context differences exist.Women are more prone to react negatively when they or their children are deprived of emotional support; this will trigger jealousy.
Women, on the other hand, will be more concerned about emotional infidelity, because they depend greatly on the resources their mate makes available to them.Mere sex drive and reproduction may not even be the same construct.Because men and women tend to have different social roles, they become psychologically different to adjust to their social roles (Eagly Wood, 1999).That's why Darwin coined the expression 'beauty for beauty's sake' - which is what we witness in swans.Such behavior involves words and deeds designed to overcome a partner's objections to engaging in sexual behavior, and it can range from verbal tactics such as false proclamations of love to threats of harm and actual physical force (Mussweiler Foster, 2000).They are shaped as they are because this suits their way of life.Because males who were adept at such behavior were more successful in securing mates and in transmitting their genes to offspring, this may have led to the development of a genetically influenced tendency for males to aggress against other males.There appears to be a thin line between the social and evolutionary theories.
So swans float so high and mightily for the same reason as the bathtime plastic duck: their bodies are full of air.
Yet swans seem to defy the laws of physics.