Derowd
A planet mentioned by Dors Venabili in Prelude to Foundation. On Derowd, promiscuous sexual activity was permitted without restraint even in public, providing traffic was not blocked. The idea was to allow people to live out all their fantasies, so they would be ready to settle down after marriage. After marriage, the concept of monogamy was absolute and unbroken. The practise stopped around 11,700 G.E. Many associates of Dr. Venabili believed that this was from pressure by other planets, who lost a great deal of tourist business to Derowd.
Read more about this topic: List Of Foundation Universe Planets