Had a brief read through of this thread.... Surely, 'Raw Milk' is safe?

What I want to know is, who the hell it was that one day decided to walk up to a cow and see if it had anything drinkable in it?
Seems an odd concept to me, you don't discover a new animal nowadays and think, 'hmm, it's got elongated nipples, I wonder if I can drink from it.'
xD