One can certainly see directly the presence of Lord Śrī Kṛṣṇa in the pages of Bhāgavatam if one has heard it from a self-realized great soul like Śukadeva Gosvāmī. One cannot, however, learn Bhāgavatam from a bogus hired reciter whose aim of life is to earn some money out of such recitation and employ the earning in sex indulgence. No one can learn Śrīmad-Bhāgavatam who is associated with persons engaged in sex life. That is the secret of learning Bhāgavatam Nor can one learn Bhāgavatam from one who interprets the text by his mundane scholarship. One has to learn Bhāgavatam from the representative of Śukadeva Gosvāmī, and no one else, if one at all wants to see Lord Śrī Kṛṣṇa in the pages.
(Srimad Bhagavatam-------1:3:44--------purport).

Regulated sex life to generate good population is worth accepting. Actually, Vidura was not interested in hearing the history of persons who merely engaged in sex life, but he was interested in the progeny of Svāyambhuva Manu because in that dynasty, good devotee kings appeared who protected their subjects very carefully with spiritual knowledge. By hearing the history of their activities, therefore, one becomes more enlightened. An important word used in this connection is parama-sammataḥ, which indicates that the progeny created by Svāyambhuva Manu and his sons was approved of by great authorities. In other words, sex life for creating exemplary population is acceptable to all sages and authorities of Vedic scripture.
(Srimad Bhagavatam-------3:21:1--------purport).

Tapaḥ is explained in the smṛti-śāstra as follows: manasaś cendriyāṇāṁ ca aikāgryaṁ paramaṁ tapaḥ. "Complete control of the mind and senses and their complete concentration on one kind of activity is called tapaḥ." Our Kṛṣṇa consciousness movement is teaching people how to concentrate the mind on devotional service. This is first-class tapaḥ. Brahmacarya, the life of celibacy, has eight aspects: one should not think of women, speak about sex life, dally with women, look lustfully at women, talk intimately with women or decide to engage in sexual intercourse, nor should one endeavor for sex life or engage in sex life. One should not even think of women or look at them, to say nothing of talking with them. This is called first-class brahmacarya. If a brahmacārī or sannyāsī talks with a woman in a secluded place, naturally there will be a possibility of sex life without anyone's knowledge. Therefore a complete brahmacārī practices just the opposite. If one is a perfect brahmacārī, he can very easily control the mind and senses, give charity, speak truthfully and so forth. To begin, however, one must control the tongue and the process of eating.
(Srimad Bhagavatam-------6:1:13-14--------purport).

When the spiritual master orders, the gṛhastha may accept sex life. This is confirmed in Bhagavad-gītā (7.11). Dharmāviruddho bhūteṣu kāmo 'smi: indulgence in sex life without disobedience to the religious rules and regulations constitutes a religious principle. The gṛhastha is allowed to indulge in sex life during the period favorable for procreation and in accordance with the spiritual master's order. If the spiritual master's orders allow a gṛhastha to engage in sex life at a particular time, then the gṛhastha may do so; otherwise, if the spiritual master orders against it, the gṛhastha should abstain. The gṛhastha must obtain permission from the spiritual master to observe the ritualistic ceremony of garbhādhāna-saṁskāra. Then he may approach his wife to beget children, otherwise not. A brāhmaṇa generally remains a brahmacārī throughout his entire life, but although some brāhmaṇas become gṛhasthas and indulge in sex life, they do so under the complete control of the spiritual master.
(Srimad Bhagavatam-------7:12:11--------purport).

When one is bound by affection for one's wife, one is attached to sexual desires that are very difficult to overcome. Therefore, according to Vedic civilization, one must voluntarily leave his so-called home and go to the forest. Pañcāśordhvaṁ vanaṁ vrajet. Human life is meant for such tapasya, or austerity. By the austerity of voluntarily stopping sex life at home and going to the forest to engage in spiritual activities in the association of devotees, one achieves the actual purpose of human life.
(Srimad Bhagavatam-------9:19:11--------purport).

Similarly, the householders, who have some license for sense gratification, perform such acts with great restraint. Sex life, intoxication and meat-eating are general tendencies of human society, but a regulated householder does not indulge inunrestricted sex life and other sense gratification. Marriage on the principles of religious life is therefore current in all civilized human society because that is the way for restricted sex life. This restricted, unattached sex life is also a kind of yajña because the restricted householder sacrifices his general tendency toward sense gratification for higher, transcendental life.
(Bhagavad-Gita--------4:26-------purport).