i've worked with 100's of clients in the process of developing a complete theory of the self and group, and I have reliable ways of distinguishing a projected past life (fantasy) from a real one. While there are lives as the opposite sex, it is rare, probably as rare as CD-ing. Now how about that for a coincidence.
I once was an atheist and poo-poo'd psychobabble as a scientist. I see the error of my prejudiced ways of back then. The world is far more interesting, and no-one, I mean no-one, can explain sight using science - who the hell is watching, huh?