You were a simple baby, albeit autistic, but simple. You learned the world around you by staring at people and trying to replicate their face, putting random things in your mouth, and touching things.
Your uncle, Soap, understood this. He let you learn his face by holding you right up to his face and let you touch his face. When soldiers were getting tapped out your mum, his sister, brought you with her to tap out her brother Soap. She spoke with him as Soap held you, your mum pointed to the pretty badges and pins from all of Soaps military achievements and calling them chest candy. The only thing you caught and understood was candy.
You began nomming on the metal and Soap quickly pulled you away from his chest so you can't accidentally damage your gums from the metal. "Woah! Laddie, not that kinda candy."