Oh the fishes will laugh

Not surprisingly, but the fish was a blowfish (rimshot!)

Seriously, it was a blowfish.  

First of all, I had no idea that fish had testicles, but that seems more like my issue so I'll move on. What I don't get is why people continue to eat blowfish or pufferfish -- it's poisonous and if if it's not prepared correctly, you die a painful, if probably comical, death.

I understand thrill seekers; skydivers, bungee jumpers, etc... but isn't there some thrust of adrenaline that accompanies that?  Is there a Japanese guy sitting at a table somewhere, getting psyched up about eating a piece of fish that might kill him?  How good is this fish?  And how good are the testicles?  And how small are the testicles?