Another moment with William

This summer has afforded me time with my son that I don't normally get during the school year. Until I really get back into a full schedule of work next month I get to be with William while mom finishes up her scholastic year. There are many moments and memories that William and I are able to create. His grasp of the english language amazes me. He understands the difference between "fast" and "faster" and "walk" and "walking" and uses terms such as these appropriately. It makes me wonder though when he has moments like this morning.
This morning as I sat on the couch watching the Today show William crawled up on the couch behind me and laid down. He proceeded to lift his legs and let them fall onto my back repeatedly. I leaned back into him and he cried out "Daddy too big!" I leaned forward again and asked, "Oh, is Daddy too big?" He replied, "Yes, too fat, too fat!" Now where does he learn things like that?