Q. The four regulative principles are good for Brahmacharis.  Why should a Grihashta person follow them and how do they help?

A. The four regulative principles namely no meat eating, no intoxication, no gambling and no illicit sex help to regulate the mind so that the Grihashta who has to deal with the outside world and worldly disturbances can be focused on the real goal of life and service to Krishna.