Acharya Prashant explains that the fundamental energy of sex is rooted in the ego's constant search for fulfillment. The ego, which he describes as a 'thirsty unit' or a 'burning mass,' believes that the route to completion passes through association with objects in the world. While the objects of desire vary throughout a person's life—from the mother in infancy to playthings in childhood, and eventually to sex in puberty—the underlying intention of the ego remains unchanged: to use the object as a means to reach the ultimate closure or peace. He notes that this search is inherently tragic because the ego expects infinite contentment from finite, petty objects, leading to inevitable failure and heartbreak in relationships.