For those who were not in love, it was tit for tat.
Even Dimitri, who professes to be in love with Natasha, has a companion. It was not only to relieve one's physical desires which was natural but also for one's own health. Once a werewolf passes adulthood, celibacy was no longer an option. This was also the reason why the werecommunity was heavily involved with the adult film and entertainment business. They had a personal stake in the growth of those industries. The council, as austere and uptight as they were, regularly had over adult film stars to help them during their Ruts.