There are countless reasons, justifications, rationalizations, explanations and excuses but lies are the quickest and surest way to create mistrust and distrust between two people. Once that trust has been undermined, it is ever more difficult for the liar to stop and for the lied to - to trust again.
It is indeed kinder to slap someone than lie to them. The sting of the slap will only last minutes, the pain of the deceit will last a lifetime and undermine the listener's sense of security in the relationship. There is truly nothing good that can come from lying.
