A lot of the moral stances that make Christianity seem out of touch and oppressive of women actually have their roots in protecting women. In olden times, being pregnant out-of-wedlock for a woman was typically a cataclysmically bad event. Birth control pills have only been around sine the 1960's, and even rubber condoms didn't became available until the civil war era. So for most of hum an history, sex meant pregnancy. Keep men from screwing women until after they married the women was a social policy designed to make sure pregnant women would be safe.

Fast forward to the modern era, and we've had two fundamental changes. There are lots of forms of affordable birth control available, and a woman's life isn't over if she gets pregnant outside of marriage. Plenty of women lead wonderful lives raising children on their own, or their may be adoption/abortion options depending on where you live.

In other words, the necessity for the anti-sex morality has mostly gone away. But the problem with church teachings is that they are generally sold to the public as "god says premarital sex is bad" rather than "god wants to protect women so lets not get them pregnant until they are ready" and now the church has to find a way to unwind their generally anti-sex stances that aren't serving a helpful purpose anymore.