I am archaic in all respects and most certainly do not claim to speak for ‘most people’. My definitions of right and wrong in morality are absolute and unchanging. By coincidence, perhaps, so are God’s.
Although ‘slut’ does typically carry a connotation of promiscuity, in my religion (traditional form) pre-marital and adulterous sex are considered mortal sins and would result in loss of soul if not forgiven. Even if it circumstances involve loss of virginity “to their high school or college sweetheart”. That’s good enough to earn the designation of slut (or male counterpart) in my lexicon.
Modern life on planet earth must really be a torment for you. All of those evil sinners just crawling everywhere...