It's a choice, so technically it depends on their decision. It happens, but yet, sometimes they end up splitting, or staying a couple, but not yet marrying. I have several different friends who are all different examples of what can happen. 1. Lets call this friend Jillian. A few years ago, she and her boyfriend ended up having an accidental child. They decided to keep the child, and stayed together a few months afterwards. The guy ended up leaving her, and she is now a single mother. 2. Lets call this friend Hannah. Her and her boyfriend have been together for several years now, and just recently I found out that she is pregnant. They are keeping the child, and getting married soon. Hope this helps! :)
If you are referring to a girl getting pregnant or a couple having sex than in some cases a unexpected pregnacy can thrust the pressure of marriage upon minors. But way less today than in the past.
The dress is said to have whispered. Dresses can not actually whisper, so it is personnification. Personification is taking an inanimate thing and giving it a human characteristic.