Mixing fish eggs with fish semen is disgusting but fish semen being on the table to begin with isn't? Oh Japan. As far as the eggs/sperm comparison, last I checked you derive actual sustenance from eggs and can survive off of them which, to me, justifies it being culturally acceptable to eat something that is actually really gross when you think about it. Same deal for milk. I don't think you can survive off of giving blowjobs to fish.