I recently went through some old boxes and found my collection of mementos - birthday cards, love letters, ticket stubs, etc. - from years gone by. I'm not convinced marriage will ever be for me, but I've always imagined if I were to get to that point, I'd want to show such a collection to my SO as a way for them to fully understand my story, so to speak. On the one hand, I think of it as a pretty powerful expression of trust in your partner... but I realize the potential for that to massively backfire by introducing jealousy and insecurities. At the same time, I'm very strongly of the belief that what is shared within a relationship is not to be shared with others outside it without mutual consent. I hate gossip, and have had my share of conflict throughout the years over desiring more privacy and discretion in my various SO's conversations with their friends and family about us. That means I would probably choose to leave aside certain things out of respect for my exes, but then I'm not sure if that devalues the gesture.