Yes, the Bible is a very ancient book. They began to write it in 1513 BC. And they wrote it for 1610 years, with interruptions.
To date, the Bible has been translated into more than 2,500 languages, and more than 5,000,000,000 copies have been published. There is no other book that is in demand! So this book is still relevant today.
Indeed, humanity has advanced far. But where? To your destruction.
Sex without marriage did not bring happiness to anyone. Sharing love and not offending anyone can only be in marriage. And outside of marriage - this is disappointment, mental suffering, terrible diseases, a complete lack of self-respect ...
When your partner leaves you for the sake of someone else, are you happy, are you not offended?
when a mother (father) leaves her children - are they happy, are they not offended?
Etc.
Only sex in marriage can bring love, happiness, satisfaction, security from many troubles.
Jeez what a load a blimmin codswallop