Prabhupāda: Four things are material demands—eating, satisfaction of the tongue or belly and satisfaction of the genital, āhāra; and sleeping and to become good defender, defense measure. These are material necessity. And the one who is spiritually advanced, these things will be reduced, almost nil. What Christ says, Jesus Christ, about sex life? What does he say?
Guest: Only in the married life.
Prabhupāda: Yes.
Devotee: Only.
Prabhupāda: Yes.
Guest: And in the future it will pass completely. (German)
Devotee: (translating) So even if you are married sex life, can be material too.
Prabhupāda: Yes. That is also regulated. When the wife is menstrual period, so after five days you can have sex life, and as soon as she is pregnant, no more sex life. So sex life is meant for progeny, not for sense pleasure. Even the animals—dogs, cats—they have a period for sex life, and as soon as the female dog is pregnant, there will no more sex life. In certain months of the year they have sex life, not all the year. So even the dogs, they follow regulation, and we human being, we do not follow. The dogs have no restriction. The female dogs are naked, and they can capture anyone, anywhere, but they do not have unless there are certain period. (greets someone) Hare Kṛṣṇa. Therefore in spiritual life, restricted regulated sex life is essential.