Hot Soup Idea

A guy walks into a restaurant and orders some soup. It takes a while before the soup to arrive and when it does it’s too hot. While waiting for the soup to cool, the guy needs to go to the bathroom. But before he leaves the table he thinks,
‘While I’m in the bathroom, somebody might eat the soup. What can I do?’ He has this flash of insight, and he pulls out of his pocket a pen and paper. He writes, ‘I’ve spat into the soup!’
After putting the note next to the soup, our clever guy runs quickly to the bathroom.
But horror, when he returns, he sees an addition in pencil on the note. It reads
‘Me too.’