I agree. When one looks beyond the glamorous, even noble veneer portrayed in the movies and television, one finds people free of inhibition when it comes to their own gratification. The sort of person that will murder on the slightest suspicion, or just for the fun of it, a person that will dismember a body, torture victims, savagely beat victims, engage in all manner of vice and whose thoughts are continually of evil is the type person in a given situation that may prefer a woman but will settle for a man.
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I respectfully disagree. I can imagine someone simply "being born into" or gradually "sliding into" the gangster subculture and quickly learning that only this type of behavior (killing people for an imagined slight; using torture to extract information, to punish informants, or to "set an example") is expected by his peers, is effective in maintaining order, and can't be avoided without signaling to others that you are a "push-over," a "patsy," or an undercover agent.
Of course, someone who is a sociopath from the "get-go" won't have to adopt these behaviors; he'll already embody them.
Regards,