Abused Toddler: "No Green Pillowcase!!!"

Killian is accustomed to sleeping on the pirate bedding set (shown above). After a peesplosion this morning, all of his bedding had to be washed and wasn't dry before nap time. Warning, the action I'm about to describe may be offensive to toddlers, do not attempt this at home. I made the mistake of thinking that any pillowcase would do, and put the green pillowcase shown above on the pillow and placed it on his bed. Killian, deeply offended by this action, launched a screaming, kicking, sobbing fit and threw the horrible pillow off the bed! Granted, I agree with his decorating taste, but COME ON, it's just a pillowcase!