grilled testicles? really
I doubt a gourmet could even find fugu testicles, much less grill them. I can understand the British prejudice, what with all the creative and colourful colloquial expressions for mans pride and joy , but in this case gonads == ovaries. And while people are injured or killed from fugu, most are not at licensed restaurants, but rather home prepared and often with the intent of "chasing the dragon", where one intentionally eats the bad parts.
Cheers.