The title is a quote from the movie Ghost of Girlfriend's Past. 

The cold truth is - it’s there in many lives as evidence. However, there are a few cases that it’s not, but why is that? At the end of the day, it depends on who you are and who you marry that makes this ultimately happen as a result of what you need to learn as a human being. We all think that we married the wrong people, when we married the right person to teach us about our self-esteem. We married the right person to teach us about our dependencies and our ignorance or arrogance. Once you separate from that or learn from it, you realize how to be a stronger person / a better person. This is the whole point of living. You suffer, so you don’t have to suffer anymore. Some people have learned this already and avoid the concept all together. Then...once they are complete, they only attract people who are complete - which FINALLY won’t give them these kind of results.