Read the following context and answer the question.
Context: We do n't really need to talk it out , we just seem to have one of those rare connections . I do n't have to tell him what I need or how I ' m feeling - he just knows . An vice - versa . I do n't know what it is , but somehow it works .
Question: What may be the reason they have such a connection ?
Answer:


They have been together for a really long time .