Do children’s ears grow slower than the rest of them?

The tall person still calls me Puppy sometimes. I suppose in his eyes I am still that little pup who would curl up on his lap and fall asleep. Technically I am still a puppy but I would squash him if I were to sit on his lap now. I have changed a lot but everything around me has not really changed that much. De and the tall person look the same and the little person is still little. I asked the tall person why this is and he explained that animals usually grow fast because their parents only look after them for a short time. He could see that I was a little alarmed by this and quickly reassured me that he and De would always look after me. That was good to hear but I was a little worried about the little person. He is nearly nine years old and I’ve seen him making a sandwich so I know he can look after himself. I asked the tall person why they still looked after him. Shouldn’t he be getting a job, perhaps one that didn’t require reaching for tall things? The tall person said that I had asked a good question and explained that children take a long time to learn everything they need to know to be able to survive in the world. Ah, I think I understand. I often hear him and De repeat the same things to the little person day after day. Perhaps, children’s ears grow slower than the rest of them?