Words come back to haunt you

Every once in a while, Biscuit will say something to me that renders me speechless. 

Sometimes, it's because I'm thinking, "Where in the world did he hear that?!" And sometimes, it's because he's repeated something that I've said to him, especially when I'm scolding him.

This morning, I was making some cinnamon muffins for a work friend's birthday, and Biscuit came into the kitchen?

"Can I help?" he asked.

"I'm almost done, but you can help me finish up," I told him.

"What should I do?" he asked.

"First, you can help me stir the batter," I told him. And he did. "Now you can put up the ingredients I'm done with."

I handed him the vegetable oil, and he said, "I know where this goes." He opened the pantry door and set the oil down. "He goes right here between his friends the goldfish and spaghetti sauce."

"Yep, that's where he goes," I said. I was using an ice cream scoop to put the batter in the muffin tin.

"Mom, those are for me, right?" Biscuit asked.

"No," I said. "These are for my work friend's birthday."

"But Mom, I thought you said they were muffins," Biscuit said.

"They ARE muffins," I said.

"But Mom, you can't have muffins for your birthday, just cake or cupcakes," Biscuit said.

"Well, my friend has a wife and a daughter, so I'm guessing they'll probably make him a cake or some cupcakes. So I decided to make muffins instead."

Biscuit stood there for a few second staring at me. Then he shrugged and held his hands out to his side. 

And you know what he said then? He said, "Well, if that's what you want to do."

Really? If that's what I want to do? I was speechless. And before I could say anything, he just turned around and walked away.

I've been trying to recall if I've ever used that phrase with him before, but I don't remember saying it. But one thing is clear. I need to work on my comebacks!