One of the more amusing thing  I have encountered  (especially online ), is how shamelessly some younger people lie.  Some of the reasons they do so is that

  • they think that they can get away with it.
  • they do not respect the person who they are telling the lie to
  • they think that the person who is lied to is a fool
  • their family background and upbringing
  • their peer group

When you confront them and ask them to provide proof to support their lies, they have no answer.