So kamasya na indriya-pritih. Just like lusty desires, generally it is with reference to sex life. So sex life is required for the physiological condition of the body. That is nature's way. Or by giving birth to some nice children, that sex life is required. Otherwise why God has made the arrangement of sex? There is need, but not duspuram. Kamasya na indriya-priti: "Don't use it for sense gratification." You use it to fulfill the real purpose. So these lusty desires, unless you live a very regulated life, then it will be duspuram, it will be never be fulfilled--always desire, always desire, always desire. So these demons, they accept the shelter of lusty desire which will never be fulfilled, will never be satiated. But those who are devas, godly, their lusty desire is controlled, restricted. Therefore this varnasrama, four varnas, and four asramas, this is education how to control this lusty desire. That is required. In the beginning of life, the children, beginning from five years old up to twenty-five years, they are trained up as brahmacari.
Why? Just to control the kamam duspuram. Kamam duspuram. Those who are not in bad association from childhood, if they practice celibacy, they are not disturbed. They are not disturbed. That is called brahmacari life. Why? To train the child of a human being. Because this human life is meant for stopping the cycle of birth and death. That is the mission.