There was a boy who could only say 'yes'.
At school he was asked 'do you want me to beat you up?' 'Yes' he answered. And got beaten. This happened every day. In the end he went to a special doctor and learned how to say 'no'.
Back in school the brutal kids said 'have you had enough?' 'No' came the answer...
Well, apparently he's over those crazy Swedes!