So this śāstra, śāstra-vidhi. Śāstra-vidhi. Loke vyavāyāmiṣa-madya-sevā nityā hi jantoḥ. Nityā hi. Na hi tatra codanā. One does not require encouragement. One is not taught in the school how to learn sexual intercourse. No. These things are already there. Nitya, nityā hi jantoḥ. Every living entity has got these propensities: intoxication, sex intercourse . . . vyavāya āmiṣa. Āmiṣa: meat-eating, fish eating. They're there already. One does not require to be educated how to eat meat, how to drink, how to use sexual intercourse. No. It is already there. Nityā hi . . . na hi tatra codanā. There is no need of encouragement.
Then why the śāstra's ordering that "You eat meat in this way. You drink in this way. You have sexual intercourse in this way"? What is the purpose? The purpose is to restrict him. Because by natural propensity he'll have . . . just like in Western countries there is no marriage practically. But they have sexual intercourse. They think, "Sex is there, available. Why we should bound ourself by marriage tie?"
They think like that. So why the marriage is there? Just to restrict. Without marriage, the man and woman will be open to so many other men and women. Therefore it is to restrict: one man, one woman. Otherwise, if you associate with so many men and so many women, this is animalism. So in order to check him from the animal life, sex intercourse, the marriage is there. This is the purpose.
Therefore śāstra. Śāstra means simply restrict. One who is accustomed to restriction, he's perfect. Not indulgence. The animals are not restricted. But nowadays, better animal is restricted. They have got a time for sexual intercourse. But these, these animals, the four, two-legged, two-hands animal, they have no restriction. Any time. Less than animal. Therefore śāstra is there.
So vaidha. Vaidha means what is sanctioned by the śāstra. That is vaidha strī-saṅga. Yes. One may have association with the women . . . there must be association with women. By God's creation, there is man, woman. They're meant for being united. So there in the Bhagavad-gītā it is said that dharmāviruddho kāmaḥ aham: "When sex intercourse is there according to the śāstra, that is I am. That is I am." Dharmāviruddhaḥ. So there are rules and regulation, how to have sex life.
So . . . there are two kinds of association with women: vaidha and avaidha. Vaidha means according to śāstra, and avaidha means without any restriction, without any restriction of the śāstra. So asat, eka strī-saṅgī, Caitanya Mahāprabhu has said. And the sahajiyās, rascals, they interpret asat eka strī-saṅgī: one who has got only one wife, he's asat; one must have many wives. The sahajiyās, you know, they keep so many women, like monkeys, in their company. You see. They have interpreted in this way. Asat eka strī-saṅgī.