It is said that the father himself becomes the son in another form. The father and son are therefore considered to be nondifferent. A widow who has her son is actually not a widow, because she has the representative of her husband. Similarly, Devahūti is indirectly asking Kardama Muni to leave a representative so that in his absence she might be relieved of her anxieties by a suitable son. A householder is not expected to remain at home for all his days. After getting his sons and daughters married, a householder can retire from household life, leaving his wife in the charge of the grown-up sons. That is the social convention of the Vedic system. Devahūti is indirectly asking that in his absence from home there be at least one male child to give her relief from her anxieties. This relief means spiritual instruction. Relief does not mean material comforts. Material comforts will end with the end of the body, but spiritual instruction will not end; it will go on with the spirit soul.
(Srimad Bhagavatam-----3:23:52-----purport).

The status of real knowledge is explained in this verse. There are many children, but we accept some children as our sons and daughters because of our affection for them, although we know very well that these children are different from us. Similarly, because of great affection for money, we accept some amount of wealth in the bank as ours. In the same way, we claim that the body is ours because of affection for it. I say that it is "my" body. I then extend that possessive concept and say, "It is my hand, my leg," and further, "It is my bank balance, my son, my daughter." But actually I know that the son and the money are separate from me. It is the same with the body; I am separate from my body. It is a question of understanding, and the proper understanding is called pratibuddha. By obtaining knowledge in devotional service, or Kṛṣṇa consciousness, one can become a liberated soul.
(Srimad Bhagavatam-----3:28:39-----purport).

It appears that Dhruva Mahārāja married after being installed on the throne of his father and after the departure of his father to the forest for self-realization. It is very important to note in this connection that since Mahārāja Uttānapāda was greatly affectionate towards his son, and since it is the duty of a father to get his sons and daughters married as quickly as possible, why did he not get his son married before he left home? The answer is that Mahārāja Uttānapāda was a rājarṣi, saintly king. Although he was busy in his political affairs and duties of government management, he was very anxious for self-realization. Therefore as soon as his son Dhruva Mahārāja was quite worthy to take charge of the government, he took this opportunity to leave home, just like his son, who, without fear, left home for self-realization, even at the age of five years. These are rare instances from which we can see that the importance of spiritual realization is above all other important work. Mahārāja Uttānapāda knew very well that to get his son Dhruva Mahārāja married was not so important that it should take preference to his going away to the forest for self-realization.
(Srimad Bhagavatam-----4;10:1-----purport).

Factually, however, pravṛtti-mārga is based on sex life. As stated in Śrīmad-Bhāgavatam (7.9.45), yan maithunādi-gṛhamedhi-sukhaṁ hi tuccham. A householder who is too much addicted to pravṛtti-mārga is actually called a gṛhamedhī, not a gṛhastha. Although the gṛhastha desires sense gratification, he acts according to Vedic instructions. The gṛhamedhī, however, who is interested only in sense gratification, does not follow any Vedic instruction. The gṛhamedhī engages himself as an advocate of sex life and also allows his sons and daughters to engage in sex and to be deprived of any glorious end in life. A gṛhastha enjoys sex life in this life as well as in the next, but a gṛhamedhī does not know what the next life is about because he is simply interested in sex in this life. On the whole, when one is too much inclined toward sex, he does not care for the transcendental spiritual life. In this age of Kali especially, no one is interested in spiritual advancement. Even though it is sometimes found that one may be interested in spiritual advancement, he is most likely to accept a bogus method of spiritual life, being misguided by so many pretenders.
(Srimad Bhagavatam-----4;25:39-----purport).

In this verse the word riktha-hāreṣu, meaning "plunderers of wealth," is very significant. One's sons, grandsons and other descendants are ultimately plunderers of one's accumulated wealth. There are many celebrated businessmen and industrialists who produce great wealth and are highly praised by the public, but all their money is ultimately plundered by their sons and grandsons. In India we have actually seen one industrialist who, like King Purañjana, was very much sexually inclined and had a half dozen wives. Each of these wives had a separate establishment that necessitated the expenditure of several thousands of rupees. When I was engaged in talking with him, I saw that he was very busy trying to secure money so that all his sons and daughters would get at least five hundred thousand rupees each. Thus such industrialists, businessmen or karmīs are called mūḍhas in the śāstras. They work very hard, accumulate money, and are satisfied to see that this money is plundered by their sons and grandsons. Such people do not want to return their wealth to its actual owner.
(Srimad Bhagavatam-----4:27:10-----purport).

There are many social functions for keeping a prestigious position in society. In different countries and societies there are various festivals and rituals. In India, the father is supposed to get his children married. When he does so, his responsibility to the family is complete. Arranging marriages is very difficult, especially in these days. At the present moment no one can perform the proper ritual of sacrifice, nor can anyone afford to pay for the marriage ceremony of sons and daughters. Therefore householders are very much distressed when they are confronted by these social duties. It is as though they were pierced by thorns and hurt by pebbles. Material attachment is so strong that despite the suffering, one cannot give it up.
(Srimad Bhagavatam-----5:14:18-----purport).