Well, my answer is still the same from a week ago or so when I posted my response to this. It's wrong to have sex before marriage. Joseph and Mary were basically what we would deem married, because their betrothal was legally binding, and they would basically have to go through a "divorce" to end it. Yet, they still couldn't have sexual relations until they were officially married, with the ceremony and all. So yeah...I think that pretty much says to me that we have to be legally married, and the whole "we're married in God's eyes" thing just doesn't cut it. That's my opinions.