The population of Earth is in crisis after a changed Sun causes most Humans to become infertile. The few remaining men and women capable of children are encouraged to join programs that schedule them with sexual partners each day. Sex is cordial and friendly, but passionless, performed in sterile rooms on furnishings designed to make the process quick.
Etid is a young man who has been in one of the programs since his teens. He has been been mated with hundreds of women but, unknown to him, there are still first-time experiences that he has yet to have.
[Etid](https://redd.it/71tt90)
Source: reddit.com/r/eroticliterature/comments/7l2t6p/eitd_scifi_multiple_partners_teacherstudent