There is no such thing as "promiscuous" in a sinful sense. THIS is another LIE of the Church. Stop using the term. It's not a sin. Sorry to keep reposting this link ... but it's really irritating when people just parrot the Church's nonsense. It's a great article, Mike ... please continue ... ;-)
Biblical Marriage Is Not Biblical
https://keith-michael.medium.com/biblical-marriage-is-not-biblical-981fcf13235c