http://cogitz.com/2009/08/24/the-most-bizarre-relationship-ever/

They say that fact is stranger than fiction and this relationship certainly proves that adage. Dumas and Santos met in Paris and had a torrid (and rather well publicized) relationship. Both had found the only living human at the time who had the capacity to satisfy their appetite and their bodies. History has given us some odd mixes but there can be no doubt that the love affair of these two human marvels is unparalleled and, frankly, I can’t even begin to imagine that something more bizarre will occur again. So remember in future if you think you will never find a mate; nature has a way of providing for all of us – no matter how unusual we are.