Yeah, well, I met my spouses parents once before we filed for her PR, and I knew there names, occupation, previous work history, birth dates,, siblings names, cousins names, issues with other family members, etc. My wife knew my employment history, siblings names, the date my wife dies, her name, the damned dogs name. And she/I lived on an island in a third world country. The point being, people in serious relationships generally make an effort to learn at least a little bit about their significant other.