Though people think they're a thing and that it applies if you live with someone for some number of years, when that wasn't even how it worked before being thrown out. It used to apply if two people planned on getting married but had to wait (like grandpa is in France and won't be back, or we can't afford the wedding we want.Not a thing here either. I didn't even know they still existed, they haven't be ed n recognized here for a couple of decades.