According to the greatest classical Ayurvedic text ‘Ashtanga Hridayam’ written by Vagbhata, “During the winter season, the person can indulge in sex daily as much as they like after making use of aphrodisiacs and obtaining strength; once in three days in spring and fall; and once every two weeks in the rainy season and summer.”
It is based on the principle “like increases like” and “opposites decrease,” which means balancing out the qualities of the season, with an appropriate sexual routine.
As per the Ayurvedic text, we can have sex every day in the winter—but only after “making use of aphrodisiacs and obtaining strength.”
In addition, Vagbhata recommends having sex only every two weeks in the summer. This is said to be the time of the year when the body is the least strong because of all the output of energy and activity. One is advised to indulge in cooling practices and sex is not one of them.
Vaghbata says that the body is medium in strength in the spring and the fall, strongest in the winter, and weakest in the summer, hence accordingly one should indulge or overindulge in sex.