Billy Pilgrim had a theory about diaries.
Women were more likely than men to think that their lives had sufficient meaning to require recording on a daily basis. It was not for the most part a God-is-leading-me-on-a-wondrous-journey kind of meaning, but more an I've-gotta-be-me-but-nobody-cares sentimentalism that passed for meaning, and they usually stopped keeping a diary by the time they hit thirty, because by then they didn't want to ponder the meaning of life anymore because it scared the crap out of them.