I often tell Sam that his food is too hot - wait a minute, blow on it! - so he doesn't dive in and burn his mouth.
Tonight as he was having his pre-bath wee, he managed to wee a bit on his hand.
Warm mummy! he remarked as he felt the temperature of the yellow liquid.
Then he said, Sam blow on it as he attempted to blow on his own wee - while still weeing.