The high priest act in the place of Inanna and she order for everything to be readied. And the bed was set up in front of entire public. The people watch the entire rituals including the sexual activity. At the end of the ceremony the entire public would shout cheerfully to show their approval and happiness. As they that this scared marriage brought prosperity to the people and to their land so they witness its successful climax.
In Egypt, the things are quite different as that of Sumerian; the Egyptian enjoyed the sex to the fullest satisfaction not only in their life time but also in the eternal life. Yes they believed in enjoying sex after the death. The false pennies and nipples found with the mummies give the proof for that. They also believed in getting children after the death (the fertility dolls with broad hip and paddle dolls with wide pubic area found with the mummies gives the proof for that).
If any knight wants to be a Pharaoh, he had to marry his half sister who must be a royal princess that was the custom of that time in Egypt.
Interestingly in Rome, marriage was unbinding license for sexual catharsis. But that meant for only the elite, Royal citizens and the common public don’t have the right to marry.