sitting in butter? what?

I turned off the shower the other day and Charlie said, from my bedroom, "Mama. I'm sitting in butter." I paused for a minute trying to decifer what he said because I knew that wasn't right. I said, "What?" He repeated and it still sounded like he said he was sitting in butter. I just said, "Ok buddy." When I got out and looked in the bedroom to figure out what he had said...this is what I found..."Mama, I'm sitting eatin peanut butter." Um...guess the peanut butter needs to be moved to a higher shelf...