The conditioned souls, or living entities who come to the material world to enjoy sense gratification, are covered in the beginning by five different conditions. The first condition is a covering of tāmisra, or anger. Constitutionally, each and every living entity has minute independence; it is misuse of that minute independence for the conditioned soul to think that he can also enjoy like the Supreme Lord or to think, "Why shall I not be a free enjoyer like the Supreme Lord?" This forgetfulness of his constitutional position is due to anger or envy. The living entity, being eternally a part-and-parcel servitor of the Supreme Lord, can never, by constitution, be an equal enjoyer with the Lord. When he forgets this, however, and tries to be one with Him, his condition is called tāmisra. Even in the field of spiritual realization, this tāmisra mentality of the living entity is hard to overcome. In trying to get out of the entanglement of material life, there are many who want to be one with the Supreme. Even in their transcendental activities, this lower-grade mentality of tāmisra continues.

Andha-tāmisra involves considering death to be the ultimate end. The atheists generally think that the body is the self and that everything is therefore ended with the end of the body. Thus they want to enjoy material life as far as possible during the existence of the body. Their theory is: "As long as you live, you should live prosperously. Never mind whether you commit all kinds of so-called sins. You must eat sumptuously. Beg, borrow and steal, and if you think that by stealing and borrowing you are being entangled in sinful activities for which you will have to pay, then just forget that misconception because after death everything is finished. No one is responsible for anything he does during his life." This atheistic conception of life is killing human civilization, for it is without knowledge of the continuation of eternal life.

This andha-tāmisra ignorance is due to tamas. The condition of not knowing anything about the spirit soul is called tamas. This material world is also generally called tamas because ninety-nine percent of its living entities are ignorant of their identity as soul. Almost everyone is thinking that he is this body; he has no information of the spirit soul. Guided by this misconception, one always thinks, "This is my body, and anything in relationship with this body is mine." For such misguided living entities, sex life is the background of material existence. Actually, the conditioned souls, in ignorance in this material world, are simply guided by sex life, and as soon as they get the opportunity for sex life, they become attached to so-called home, motherland, children, wealth and opulence. As these attachments increase, moha, or the illusion of the bodily concept of life, also increases. Thus the idea that "I am this body, and everything belonging to this body is mine" also increases, and as the whole world is put into moha, sectarian societies, families and nationalities are created, and they fight with one another. Mahā-moha means to be mad after material enjoyment. Especially in this age of Kali, everyone is overwhelmed by the madness to accumulate paraphernalia for material enjoyment.

(Srimad Bhagavatam------3:20:18-------purport).

It is understood herein that Adharma, Irreligion, was also a son of Brahmā, and he married his sister Mṛṣā. This is the beginning of sex life between brother and sister. This unnatural combination of sex life can be possible in human society only where there is Adharma, or Irreligion. It is understood that in the beginning of creation Brahmā created not only saintly sons like Sanaka, Sanātana and Nārada but also demonic offspring like Nirṛti, Adharma, Dambha and Falsity. Everything was created by Brahmā in the beginning. Regarding Nārada, it is understood that because his previous life was very pious and his association very good, he was born as Nārada. Others were also born in their own capacities, according to their backgrounds. The law of karma continues birth after birth, and when there is a new creation, the same karma comes back with the living entities. They are born in different capacities according to karma even though their father is originally Brahmā, who is the exalted qualitative incarnation of the Supreme Personality of Godhead.

(Srimad Bhagavatam------4:8:2-------purport).

After coming back to his hermitage, he divided himself into nine personalities just to give pleasure to Devahūti, the daughter of Manu, who was eager for sex life. In that way he enjoyed with her for many, many years, which passed just like a moment.
Here the daughter of Svāyambhuva Manu, Devahūti, is described as suratotsuka. After traveling with her husband all over the universe, in Mount Meru and the beautiful gardens of the heavenly kingdoms, she naturally became sexually stimulated, and in order to satisfy her sexual desire, Kardama Muni expanded himself into nine forms. Instead of one, he became nine, and nine persons had sexual intercourse with Devahūti for many, many years. It is understood that the sexual appetite of a woman is nine times greater than that of a man. That is clearly indicated here. Otherwise, Kardama Muni would have had no reason to expand himself into nine. Here is another example of yogic power. As the Supreme Personality of Godhead can expand Himself in millions of forms, a yogī can also expand up to nine forms, but not more than that. Another example is that of Saubhari Muni; he also expanded himself into eight forms. But however powerful a yogī may be, he cannot expand himself into more than eight or nine forms. The Supreme Personality of Godhead, however, can expand Himself into millions of forms, ananta-rūpa—innumerable, countless forms—as stated in the Brahma-saṁhitā. No one can compare to the Supreme Personality of Godhead by any conceivable energetic manifestation of power.

(Srimad Bhagavatam------3:23:44-------purport).

After completing one's education as a brahmacārī in this way, one should give dakṣiṇā, an offering of gratitude, to one's guru, and then one may leave for home and accept the next āśrama-the gṛhastha-āśrama-or else one may continue in the brahmacarya-āśrama without adulteration. The duties for the gṛhastha-āśrama and brahmacarya-āśrama, as well as the duties for sannyāsīs, are prescribed in the śāstras. A gṛhastha is not meant to enjoy sex life without restriction. Indeed, the whole purpose of Vedic life is to become free from sexual indulgence. All the āśramas are recognized for spiritual progress, and therefore although the gṛhastha-āśrama gives a kind of license for sex life for a certain time, it does not allow unrestricted sex life. Therefore, in gṛhastha life also, there is no illicit sex. A gṛhastha should not accept a woman for sexual enjoyment. Wasting semen is also illicit sex.

(Srimad Bhagavatam------7:12-------summary).

Actually it is the position, but because we are under the spell of māyā, we are captivated, bewildered, that after sex life, not only human being, but anyone who is living within this material world, beginning from Brahmā down to the smallest insect, everyone is after sex life. We have heard that even Lord Śiva, Lord Brahmā, they became sexually excited. It is said that Lord Brahmā was enchanted by daughter, what to speak of others. This material world is so, I mean to say, bewildering, that sometimes the first-class person also becomes bewildered by sex life. Therefore it is strictly prohibited that one should not remain in a solitary place with woman even though the woman is mother, sister or daughter. This is the injunction of the śāstra. Mātrā svasrā duhitrā vā na viviktāsane vāset, balavān indriya-grāmo vidvaṁsam api karṣati (S.B.9:19:17). This is the order, that mātrā... Mātrā means "along with mother," svasrā mean "along with sister," and duhitrā means "along with daughter." "One should not sit down in a solitary place even with mother, sister or daughter."

(Lecture on Srimad Bhagavatam-------Bombay, 1976).

The learned Kaśyapa said: Because of your mind's being polluted, because of defilement of the particular time, because of your negligence of my directions, and because of your being apathetic to the demigods, everything was inauspicious. The conditions for having good progeny in society are that the husband should be disciplined in religious and regulative principles and the wife should be faithful to the husband. In Bhagavad-gītā (7.11) it is said that sexual intercourse according to religious principles is a representation of Kṛṣṇa consciousness. Before engaging in sexual intercourse, both the husband and the wife must consider their mental condition, the particular time, the husband's direction, and obedience to the demigods. According to Vedic society, there is a suitable auspicious time for sex life, which is called the time for garbhādhāna. Diti neglected all the principles of scriptural injunction, and therefore, although she was very anxious for auspicious children, she was informed that her children would not be worthy to be the sons of a brāhmaṇa. There is a clear indication herein that a brāhmaṇa's son is not always a brāhmaṇa. Personalities like Rāvaṇa and Hiraṇyakaśipu were actually born of brāhmaṇas, but they were not accepted as brāhmaṇas because their fathers did not follow the regulative principles for their birth. Such children are called demons, or Rākṣasas. There were only one or two Rākṣasas in the previous ages due to negligence of the disciplinary methods, but during the age of Kali there is no discipline in sex life. How, then, can one expect good children? Certainly unwanted children cannot be a source of happiness in society, but through the Kṛṣṇa consciousness movement they can be raised to the human standard by chanting the holy name of God. That is the unique contribution of Lord Caitanya to human society.

(Srimad Bhagavatam------3:14:38-------translation and purport).