Quip: I wonder. Does a fly feel pain when I tear off its legs?

I like this comment by Artfldgr 09/28/09 at NeoNeocon:

About Sociopaths

Imagine 1/25th of the population having no conscience at all, no guilt or remorse, no sense of concern for the well-being even of family members. Imagine no struggle with shame, no matter what kind of selfish or immoral action you take.

Now add the ability to conceal from other people that your psychological makeup is radically different from theirs. Since everyone simply assumes that conscience is universal among human beings, hiding the fact that you are conscience-free is nearly effortless.

(There is more)