The Vedic literature is not only full of spiritual instruction but is also instructive in how to prosecute material existence very nicely, with the ultimate aim of spiritual perfection. Devahuti asked her husband, therefore, how to prepare herself for sex life according to the Vedic instructions. Sex life is especially meant for having good children. The circumstances for creating good children are mentioned in kama-shastra, the scripture in which suitable arrangements are prescribed for factually glorious sex life. Everything needed is mentioned in the scriptures–what sort of house and decorations there should be, what sort of dress the wife should have, how she should be decorated with ointments, scents, and other attractive features, etc. With these requisites fulfilled, the husband will be attracted by her beauty, and a favourable mental situation will be created. The mental situation at the time of sex life may then be transferred into the womb of the wife, and good children can come out of that pregnancy. Here is a special reference to Devahuti’s bodily features. Because she had become skinny, she feared that her body might have no attraction for Kardama. She wanted to be instructed on how to improve her bodily condition in order to attract her husband. Sexual intercourse in which the husband is attracted to the wife is sure to produce a male child, but sexual intercourse based on the attraction of the wife for the husband may produce a girl. That is mentioned in the Ayurveda. When the passion of the woman is greater, there is a chance of a girl’s being born. When the passion of the man is greater, then there is the possibility of a son. Devahuti wanted the passion of her husband to be increased by the arrangement mentioned in the kama-shastra. She wanted him to instruct her in that way, and she also requested that he arrange for a suitable house because the hermitage in which Kardama Muni was living was very simple and completely in the mode of goodness, and there was less possibility of passion’s being aroused in his heart.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Second Canto, Chapter 11 – Text 11