"Yellow bus" has now mutated into "white-yellow bus"

Now I know that Can is just messing with me. Mom brought the kids to Chapel Hill last Friday for a departmental Christmas party. While they were here they passed one of the blue and white buses that I ride to the park-and-ride lot and Can got to see it. When I met them coming in from the parking lot he said, "daddy white-blue bus." I grinned and said, "yes, daddy white-blue bus," thinking that I had finally won the argument and he was accepting that I ride a blue bus not a yellow bus on my way to work. This morning, as he was sitting on his mommy's lap trying to return from dreamland to reality, he started mumbling something that I couldn't hear very well. I moved closer to try and catch what he was saying and I heard, "daddy white-yellow bus." Aaargh. "Its not white-yellow bus, it is white-blue bus," I responded. That only got him going and he began chanting, softly at first but then louder and louder, "daddy white-yellow bus, daddy white-yellow bus..." I did the only thing I could, under the circumstances. I grabbed him and gave him a big fuzzy bearded kiss and said, "daddy softy face," before making a break for the front door. As I was closing the door behind me I heard him say, "NO, DADDY POKEY FACE."