Content warning lewd
It was true that reproduction was no longer the concern of the body, being far too important to be left to games of chance with chromosomes as dice. Yet though conception and birth were no longer even memories, sex remained. Even in ancient times, not even one hundredth part of sexual activity had been concerned with reproduction.
— The City and the Stars by Arthur C. Clarke (Page 26 - 27)
"just to be clear... even though humans reproduce asexually in this setting, you ARE allowed to write smut based on it"