So maybe it’s true that talk is the reason having a sister makes you happier, but it needn’t be talk about emotions. When women told me they talk to their sisters more often, at greater length and about more personal topics, I suspect it’s that first element ”” more often ”” that is crucial rather than the last.
This makes sense to me as a linguist who truly believes that women’s ways of talking are not inherently better than men’s. It also feels right to me as a woman with two sisters ”” one who likes to have long conversations about feelings and one who doesn’t, but who both make me happier.