Sanctity is the fact or quality of being holy or sacred. When you talk about sanctity you are surely reffering to something that is important and that deserves respect. The sanctity might need reaffirmation in order to prevent
That holiness from being threaten. An example of this can be the couples that reaffirm the sanctity of their vows some years after their wedding. It is a way of demostrating that their marriage is still sacred.