A friend wrote a comment on this site asking about "cow semen soup". I tried to find a culture that ate cow semen soup but I couldn't find one (does not mean there isn't one).
I did come across a list of some of the unusal meals served around the world. I have always said that in America we are very jaded when it comes to how "acceptable animals to eat" is defined. Rats in some villages is the only meat to be found. Or in a vegetarian village we must look like crazed individuals when we have a chicken sandwitch. Of course its all prespective.
All that said - a few things on this list are a bit much - read at your own risk.