Do we expect people to lie to us

There's no person in world that don't lie. Everyone in their lifetime for at least once have lied. Lying is not a bad thing if it prevents someone from getting hurt. People often lie as Ericsson said that lying is like a lubricant in a machine, it simplifies things in our daily life. But too much lying can put one in a deep trouble that he will not be able to get out of it. we should be ready to face those lie and act according to it. There are things that one doesn't want to know the truth about, its better that one lies you about it. we can tell people by the way they talk that they are lying. so we should just do what we know is good for us.