My best friend just called me and told me that his 18 year-old sister, a JW but not yet baptized, is getting married very soon. She has had a boyfriend, a JW not baptized either and they have been having sex regularly. Her mother sent her 2000 miles away to try to prevent this from happening anymore. Within no time she was back and "getting into trouble" again.
My buddy (raised in it but not a JW now), said his parents and sister are ecstatic that she is deciding to marry the guy, since then she won't be insulting Jehoober. I have never met the guy, but my friend has told me stories about how controlling he is. IMO he will be abusive to her to the extreme, if not physically, at least emotionally and probably financially abusive.
The moral of their JW story: God likes you better if you subject yourself to years of abuse than if you have sex before marriage.