I had asked few questions . One of them is the following : https://cogsci.stackexchange.com/questions/10457/human-brother-sister-bonding
It was a fairly interesting topic to ponder about and I would love to extend this question to include even mother-son relationship, which was what I planned initially . I guess in that case the answer might bear some connections to oedipus complex theory and hence this complex is a bit distant to sibling bonding between people from opposite gender and as such I thought of putting that question exclusively for the latter. May I know what happened?