Why do Irishmen dislike the smell of a boiling sheep's head?

This Irishmen keeps complaining whenever I boil a sheep's head. He even got upset when he opened the pot and saw a sheep head's looking back at him. He says it's disgusting and grim. I just do not get it. What's the difference between eating a steak and eating a sheep's head? If you are going to eat animals, then why not eat the face too?