Why so effectively spread computer viruses? As for ourselves for the curious, by the way we are, by our cultural traits. These features are exploited by malware these days W32-Sir cam,= which has crippled mail servers.
The sayings are usually popular wisdom passed down from generation to generation by word. For purposes of computing and the Internet is one that is just perfect to describe what happens with computer viruses.
Most malicious code or viruses make use of what has been called the social engineering to spread which is nothing but an act of seduction to convince a person to execute a file, which contains the virus and could not otherwise become contaminated. Such are the most viruses.
There are other more elaborate traps, such as the recent Sir Cam or W32-Sir cam which operates in a way our pride in inquiring an opinion on an attachment to an email, which is not simply the virus. The script is so well done it takes the email from someone you know and even the names of some of its files to auto send. Obviously in our circle of cyberfriends the topics will be matched, the handle. Then, feeling well versed on the issue, open the attachment willing to share our wisdom and Au revoir have been infected.
But other malicious scripts that do not resort to social engineering. Are those able to infect only display the message. That is the case, for example many viruses written in Visual Basic. These viruses are hidden in the HTML format email messages and against them just a good antivirus updated continuously might be able to protect us. I say might because most of this protection does not provide what sound an offer.