A Untrained Man is never satisfied by one woman

From Srila Prabhupada's purports to:

SB 4.26.17
King Purañjana left home, neglected his own wife and engaged himself in killing animals. This is the position of all materialistic men. They do not care for a married chaste wife. They take the wife only as an instrument for sense enjoyment, not as a means for devotional service. To have unrestricted sex life, the karmīs work very hard. They have concluded that the best course is to have sex with any woman and simply pay the price for her, as though she were a mercantile commodity. Thus they engage their energy in working very hard for such material acquisitions. Such materialistic people have lost their good intelligence. They must search out their intelligence within the heart. A person who does not have a chaste wife accepted by religious principles always has a bewildered intelligence.

SB 4.26.6

People have become so degraded in this age that on the one hand they restrict polygamy and on the other hand they hunt for women in so many ways. Many business concerns publicly advertise that topless girls are available in this club or in that shop. Thus women have become instruments of sense enjoyment in modern society. The Vedasenjoin, however, that if a man has the propensity to enjoy more than one wife — as is sometimes the propensity for men in the higher social order, such as the brāhmaṇas, kṣatriyas and vaiśyas, and even sometimes the śūdras — he is allowed to marry more than one wife. Marriage means taking complete charge of a woman and living peacefully without debauchery. At the present moment, however, debauchery is unrestricted. Nonetheless, society makes a law that one should not marry more than one wife. This is typical of a demoniac society.

SB 4.26.4:One form of hunting is known as woman-hunting. A conditioned soul is never satisfied with one wife. Those whose senses are very much uncontrolled especially try to hunt for many women. King Purañjana’s abandoning the company of his religiously married wife is representative of the conditioned soul’s attempt to hunt for many women for sense gratification. Wherever a king goes, he is supposed to be accompanied by his queen, but when the king, or conditioned soul, becomes greatly overpowered by the desire for sense gratification, he does not care for religious principles.

SB 4.25.44

A living entity is never satisfied with a woman unless he is trained in the system of brahmacarya. Generally a man’s tendency is to enjoy many women, and even at the very end of life the sex impulse is so strong that even though one is very old he still wants to enjoy the company of young girls. Thus because of the strong sex impulse the living entity becomes more and more involved in this material world.