In ancient India, large population was not a socio-economic problem. Emphasis
in those days was given not only to the number of children one gave
birth to, but also to the fact that they should be healthy and
wise. Hence more importance was given to the birth of supraja (su means good and
praja means people ). With this in view, Lopamudra wanted to have only one virtuous son in preference to hundreds of undesirable ones.
Sexual act in those days was considered as a part of dharma or religious duty, which
was to be performed
only as a duty(karma). Except for the sole purpose of procreation, sexual union was
proscribed. They also considered the fact that semen, when preserved in the body through the process of brahmacharaya (celibacy) promotes strength, complexion, longevity and the power of resistance to disease and decay.