Follow up: MY theory of love.
 
Mine is not as cool as coolgoh's... and the england not that powerful also. But indeed can make coolgoh's crapiness extremely evident. Haha.
 
XIAOYANG's theory of love.
 
Human beings are the only animals we know that possess the feeling of ‘love’. This inbred feeling exists mutually between individuals, and it is unlike pain, itch or boredom that can be explained figuratively or literally. Most of the time people themselves do not know why such a feeling arises. In literature, it has been depicted as something so beautiful that millions of people can give up all their wealth and power for it. Yet, love is also a source of unhappiness, in which rivalry, jealousy, dishonesty and depression can manifest as a result.
 
Love has seldom been explained in a scientific or logical manner. Though psychologists and neurologists are working hard in an attempt to unveil its mystery, little progress has been made. It is true that neurological studies have shown that certain parts of the brain are activated in a distinctive manner when a person is in love, and when this feeling becomes intense physiological responses such as a raise in heart rate, brushing, and the feeling of anxiousness indicates sympathetic nerve stimulation. However, we do not know much further than this.
 
How does love arise? This is the question I will attempt to discuss here. I believe that love is a product of evolution. Recent studies have found that memory and behavioural patterns are formed and retained by a series of ‘wiring’ that takes place inside the brain. Dendrites and axons grow from neurones, creating new synapses with other neurones while breaking old ones. Genetic factors play some parts in this process. Hence, love may be a product of such a process, which may have developed since our very early ancestors and passed down as almost unaltered due to its evolutionary advantages.
 
In one perspective, love is actually an extension of the ‘motherly’ nature of female animals. Similarly, when someone is in love, that person would offer protection and the best things he (or she) can offer to the other party, in the meantime both parties will develop a high level of acceptance and dependence on each other. This works for all kinds of love, be that between couples, between siblings, or between parents and children. The Darwinian theory of evolution suggests that the best-adapted individuals in an environment survive. In the human context, mutual love ensures the people involved in the relationship acquire the best conditions required for the competition of life. The protection, care and materials provided enable the individuals to acquire the best possible physical and psychological health and hence increase his competitiveness and adaptability. The dependence (both physical and psychological) hence developed will ensure that this mutual relationship does not break too easily, resulting in optimal utilization of resources by both parties. This enables both parties to compete as an integrated unit, increasing the chance of survival and success in competition.
 
In another perspective, love is an act of choosing a mate. In a human society where courtship and mating cannot take place as randomly and openly as other animals do, an elaborate mechanism of choosing a mate becomes essential. Also, given the comparatively low reproductive capacity of the human female, choosing the correct mates becomes important too. When one falls in love with someone else, there are certain qualities in which both parties of a couple see in each other that they admire. This kind of admiration is often the prerequisite of love between couples in human behaviour, and this admiration can be seen as criteria used in choosing a mate. For animals, admiration may have been sufficient to initiate mating; however, due to the more complex nature of human qualities and behaviour, love, whatever the extent, is required before permitted mating occurs (generally). This allows human beings to exhibit their best self and finally their true qualities before determining the best mate. It is a mechanism that allows human beings to pick the best partner and hence produce the best children they perceive. It ensures the best offspring to be produced.

Most things can be explained in a logical manner. Love is no exception. The beauty of things will not be destroyed when they are logically explained. Nobody ceases to admire the beauty of sunrise even if we know why it occurs. In fact, I always believe that things can better be appreciated if it is explained. We start our efforts in conserving wildlife because we now understand the mechanisms of ecology and the importance of biodiversity. Nobody will cease to praise love because he knows why he does; it is because he knows why he loves someone he cherishes the relationship even more.