Indian man: It is negation of sex.
Prabhupāda: Yes. Otherwise sex life is there in the cats and dogs. If you are going to be a dog? You must act as a human being. This is to act as human being, that "I shall not become a father, my dear wife, you should not become a mother, if both of us are not expert how to save the death of our child." This is good sex life. If you are not expert to execute this scientific method, that is bad sex life. It is the dog's sex life.
Indian man: Has anybody practiced this type of sex?
Prabhupāda: Yes, there are so many. That is the Vedic civilization.
Indian man: They have shielded a child from death.
Prabhupāda: Yes, many, many.
Indian man: An example.
Prabhupāda: An example, that first of all you know how you can save the death.
Indian man: I do not know.
Prabhupāda: Ah, if you do not know that problem. (Prabhupāda is laughing)
Indian man: That is the biggest problem. (laughing)
Prabhupāda: That is.
Indian man: The body comes, then the soul. But that part is, I don't...
Prabhupāda: First of all, you have understood that unless you are capable of training your child not to die, you should not become a father. First of all, you have to accept this principle. Then how to save the child from death, that is next question. Let us go step by step. Your question was what is the good sex life, the answer is given here.
Indian man: Answer is very complicated.
Prabhupāda: Not complicated. The answer is... But how to become expert to save the child from death, that is another science that you should know. If you want to stop your self... (break) ...no need of a child to whom you have to give your care to make him, to raise him in such a way, if there is no such need, then there is no need of sex life. If you enjoy sex life for sense enjoyment, that is atrocity. That is atrocity. That is Vedic civilization. Because before sex life we have got saṁskāras, garbhādhāna-saṁskāra. The purpose is there, that "I shall train my child how to stop death. And the child must be so good that he will take my instruction." And therefore garbhādhāna-saṁskāra. So without garbhādhāna-saṁskāra, one who enjoys sex life, he is the most sinful. Not that "Whenever and wherever I like and with whomever I like I shall have sex life." It is all sinful activity. Therefore Kṛṣṇa says dharma aviruddhaḥ kāmo 'smi. Sex life which is not against religious principles, that I am. So if we try to understand this one verse, we become self-realized. Similarly, each verse of Bhagavad-gītā is like that.