Whenever there is a nice atmosphere in the material world, immediately there is an awakening of the sexual appetite in the minds of materialistic persons. This tendency is present everywhere within this material world, not only on this earth but in higher planetary systems as well. In complete contrast with the influence of this atmosphere on the minds of the living entities within the material world is the description of the spiritual world. The women there are hundreds and thousands of times more beautiful than the women here in this material world, and the spiritual atmosphere is also many times better. Yet despite the pleasant atmosphere, the minds of the denizens do not become agitated because in the spiritual world, the Vaikuntha planets, the spiritualistic minds of the inhabitants are so much absorbed in the spiritual vibration of chanting the glories of the Lord that such enjoyment could not be surpassed by any other enjoyment, even sex, which is the culmination of all pleasure in the material world. In other words, in the Vaikuntha world, in spite of its better atmosphere and facilities, there is no impetus for sex life. As stated in Bhagavad-gita (2.59), param drstva nivariate: the inhabitants are so spiritually enlightened that in the presence of such spirituality, sex life is insignificant.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Fourth Canto, Chapter 06 – Text 30