It is not anyone's duty to procreate. It is the duty of our DNA to keep enough of us wanting to procreate if it wishes for itself to be replicated enough times.

we are but vessels to represent the longevity and dominance of the human strain of DNA. We will all die but the DNA will outlive many of us until our species is extinct.

People's only duty is the fecal matter lodged in their colon.

It is no longer necessary for us to procreate, today, we have the Duggars.