Prabhupāda: I say, "illicit sex." Without marriage, sex relation is forbidden.
Interviewer: I see. Would you say that there were times when, well, that there were marriages which were also illicit?
Prabhupāda: No. Of course, in civilized human society, either in India or in any other country, marriage is considered as sanctified, either in Hindu community or Christian community or Mohammedan community. But apart from that, for spiritual advancement, according to Vedic culture, sex indulgence is always restricted.
Interviewer: Always restricted. For purposes of procreation only?
Prabhupāda: No, no. Yes. Sex, sex intercourse, is recommended only for good children. That's all.
Interviewer: Only to create children.
Prabhupāda: Yes, good children.