I've always wondered if conjoined twins being raised as one person would somehow lead to better development and quality of life for them, Abby and Brittany aside. I've heard of a few instances of dicephalus twins being given one name, but none of them survived past infancy. Also, I stumbled upon a paper with an interesting thing at the end of the abstract.

> [...] the over-riding impression is that of two individuals desperately struggling to arrive at some kind of personal identity. It is suggested that the ultimate resolution of their dilemma will involve a fusion of identity so that they will come to regard themselves as a unified organism rather than two separate individuals.