Ben is allowed to drink diet soda, but we normally only let him have the decaffeinated ones.
The other day, I handed him the last sip of my diet coke the other day and told him that he could finish it off.
He threw his hands up in the air and exasperated,
"What if my ketones get 'yow' (low)?"
I laughed and then reassured him that it was OK for him to drink and he enjoyed the last little drop.
But I'm proud of him because it shows that he has definately started to internalize the importance of the diet and is understanding how it works.