I think my SO is as close to perfect as I'm going to find for myself, and there is no WAY I'd share everything with him. Even after 25 years...or maybe,
especially after 25 years. I'd start to feel as if I was an extension of him, rather than my own person.
I think if someone in a relationship is wanting to know everything, and to be a part of everything, its a sign of controlling behavior, but each to their own. I'm always surprised at what works for some couples.
My SO is pretty open with me, but really I dont need to know everything. Honestly honey..just...keep it to yourself. A bit.