"Fries are the euphemistic and prevailing culinary term for the testicles of cows, pigs and sheep"- according to Hugh Fearnley-Whittingstall in his River Cottage Meat Book.
Fries from pigs and sheep yes, but cows? I'm concerned by HFW's understanding of bovine anatomy.
Add that to my list of incredible foods: bird's milk and cow's eggs... Cow's testicles!