Prabhupada: There are, daśa-vidhā-saṁskāra, reformatory. How it is scientific, just to bring the born child to the standard of civilization. The cats and dogs, they also beget children on the street. A human being also does like that, like cats and dogs. Then how they can expect very intelligent children, advanced children? Therefore there is method, how to beget children. So before begetting children, there is ceremony, garbhādhāna-saṁskāra, how to impregnate the wife. Garbhādhāna. It is not sex enjoyment. Therefore in the Bhagavad-gītā you will find this word dharma aviruddha-kāmaḥ aham asmi. Where is that Bhagavad-gītā? Find out dharmāviruddhaḥ kāmo 'smi.
Devotee: (aside:) Do you know where it is?
Nitāi: Yeah, it's in the Seventh Chapter, about verse fourteen.
Prabhupāda: No, no, why don't you consult the index in which Kṛṣṇa says "Sex life which is not against the principles of dharma or the varṇāśrama principle, that is I am." Sex life also is Kṛṣṇa. Have you got it?
Nitāi: Yes.