Followed the link on Ivy's blog and took the Mutant test

Well, gee...there's two of me living upside down of each other. Most of it is also true. That part about putting the milk in the freezer...ha, ha, ha...that was so spot-on. I really did that once in a fit of absentmindedness. Talk about topsy-turvy logic...

You have a: CRANIOPAGUS PARASITE

Your parasite, also known as a duplicata incompleta, is what would have been a conjoined twin attached to you at the head, but its development was stunted in the womb.

You often have the feeling that you are not alone, though nobody accosts you, or blocks your path. More, it seems you possess a sort of guardian or alter ego, someone who watches over you, but who sees things you do not see, or sees the same things, but from an inverse perspective. You are occasionally stirred by sensations that have no identifiable source within conscious experience. You occasionally perform actions you did not intend, e.g. putting away the milk in the freezer, that seem to reflect some sort of logic, but a logic that is back to front, or topsy-turvy. Sometimes it is a burden to know that for everything you think you understand, there is another interpretation you cannot access—probably one that, if revealed, would turn everything you believe on its head. Usually, though, this is a source of secret satisfaction, as it may be the case that what seems to you your worse mistake may be in fact your salvation. You are particularly drawn to the optical trickery of the Changing Head. Your literary form is the ghost story.

You are related to...
The Two-Headed Boy of Bengal, born in 1783 in Mundul Gait, Bengal