Me: What's your brother's name?
Michael: Umm. Suzy!
Me: His name is Sidamo, we'll call him Sid.
Michael: Well, I want to call him Suzy.
Me: Suzy is a girl's name, honey.
Me: Why do you want to call him Suzy?
Michael: Because I like Susan in Monster vs Aliens..........
Hmm. How do we argue the logic of a 5 YO......