Gustin: I want drink that.
Me: No, you can't drink my water because I'm sick.
Gustin: I want sick!
Me: No, you don't want sick. Do you want me to get you some water?
Gustin: No way! I want sick.
Me: No you don't. Sick is yucky.
Gustin: No, not yucky. I like sick.
Me: You silly boy! You don't like sick. Sick is no fun. Do you want some milk?
Gustin: No, I want sick. I like sick. I love sick! I want sick in cup!