Having a cast-iron stomach is a good thing? Sometimes it is a good thing. Because if I have a cast-iron stomach, I can enjoy eating. My stomach is very sensitive. If I eat too much, I feel like vomiting. Long ago I went the emergency, because got a stomachache. I ate cool food and threw up all night. I felt like died. But if someone have cast-iron stomack, he will don't care his stomach. He can eat much food, and everything. But his body isn't real iron, so he could hurt his body. I think that our body have to care well. So we can live a long time.