A Simple (Albeit Comical) Argument for Christian Theology

I read this the other evening and thought it thought-provoking.  It's originally from CS Lewis' Miracles.  I added some paragraph breaks to make it less scary.

Almost the whole of Christian theology could perhaps be deduced from the two facts (a) That men make coarse jokes, and (b) That they feel the dead to be uncanny.   

The coarse joke proclaims that we have here an animal which finds its own animality either objectionable or funny.  Unless there had been a quarrel between the spirit and the organism I do not see how this could be: it is the very mark of the two not being ‘at home’ together.  But it is very difficult to imagine such a state of affairs as original - to suppose a creature which from the very first was half shocked and half tickled to death at the mere fact of being the creature it is.  I do not perceive that dogs see anything funny about being dogs: I suspect that angels see nothing funny about being angels.  

Our feeling about the dead is equally odd.  It is idle to say that we dislike corpses because we are afraid of ghosts.  You might say with equal truth that we fear ghosts because we dislike corpses - for the ghost owes much of its horror to the associated ideas of pallor, decay, coffins, shrouds, and worms.  In reality we hate the division which makes possible the conception of either corpse or ghost.  Because the thing ought not to be divided, each of the halves into which it falls by division is detestable.   

The explanations which Naturalism gives both of bodily shame and of our feeling about the dead are not satisfactory.  It refers us to primitive taboos and superstitions - as if these themselves were not obviously results of the thing to be explained.  But once accept the Christian doctrine that man was originally a unity and that the present division is unnatural, and all the phenomena fall into place. 

Anyway.  Discuss.