Sperm dinner in Tokyo

Dammit. I just found out that the creamy white blob things I ate at my birthday sushi dinner in Tokyo was cod milt, or shirako. Hitomi's father ordered them for me (I ate what he ate), and when I asked what they were, the translations were all pretty vague. And so I ate them. 4 of the little buggers. And now, I wish that I had photographed the dish. Would I have eaten them if I had known that they were sacks of cod sperm? Probably, since everything I ate that night (save the cake) was ordered for me by her father. You can't really not eat something in that situation. In fact, I remember thinking, "I don't know what these things are, but if I'm going to eat them, I might as well really taste them," and so I spread each piece over my entire tongue and mouth in order to sample it properly; because I was so deliberate about the experience, I can still vividly remember the vinegared taste...

Anyway, I'm going to order shirako for one of my friends sometime. I've read that it can be found in the Bay Area and in New York. I'm pretty sure Patchen would eat it. In fact, he's probably out trying to find some right now...