The very fact we use the term "cold-blooded" as a synonym for "heartless" should tell you something about the innate bias we primates hold against reptiles. Do not judge other species by your own social norms.

Our probable ancestors, Homo erectus and Homo habilis -now extinct- are classified as of the same genus (Homo) but of different species, although no one (at least lately) has attempted the appropriate experiments to see if crosses of them with us would produce fertile offspring.

The social codes are different, distinctly preppy, fraternity-sorority, hip, flip, fast-and-cute, nauseating, and artificial. I have no doubt that the majority of these people are interesting, likeable, intelligent people. Unfortunately, they've been taught not to show it. The problem lies in socializing. When these people socialize, they don a common "mask." They talk a certain way (hip, flip) act a certain way, do certain things, all of which have been defined as socially acceptable. By acting in such a way, one makes "friends." With time, friends use their masks less and less, and a true, deep friendship results.

Like many who'd married in the war, my parents were finding it hard to survive the peace. This wasn't because they had discovered that they didn't love each other once their life together wasn't spiced with constant separations and the threat of death. Far from it. But they hadn't chosen each other so much against the social grain that they were tense, self-conscious, embattled, as though something was supposed to go wrong. Their families didn't like their marriage, nor did the village.

Social norms define buildings not Architecture

A crime is born in the gap between the morality of society and that of the individual.