I'm just telling what my (awesome) Ethic and Religious Culture teacher told me. Take it or leave itDo you mean infidelity?
Because this clashes with the rest of your post.
Interesting bit of history, but I am fairly certain the Torah and Bible (or what was written down at the time) both said that pre-marital sex was bad because the Catholic Church became big...
They probably cracked down on it hard due to the orphans though.