Why they do this is so they are not told to be witches. A character named abbie gale slept with john proctor. John and he lie to cover up the truth. John tells his wife that he doesn't want to go to town. John is scared his wife will find out about it there.
The truth is important but john trys to avoid the truth. He lies to his wife and says he just doesn't want to go to the town. If john told his wife church would find out and try to hang him for the witchcraft. If john told his wife the truth she might