Being married to the military, I'm not always allowed to know "everything" my husband does, sees, hears, etc. so on that aspect we don't share everything. But as far as life, I would say we share about 99.9% of everything. We talk all the time (good communication is the key to our marriage) and at least once a week we learn something new about the other. We've been married for almost 8 years and although I like to think I know everything about my spouse, I know there's no way to REALLY know everything about a person.