Cough Syrup

AB came home from work one day with a sore throat, fever and a bad cough. After dinner and a shower he went straight to bed and asked if I would bring him the cough syrup. 

I walked into the bathroom and found the bottle of cough syrup in the cabinet. Somehow the label had been torn off, but  I gave it to him anyway. 

AB never used a spoon to measure his medicine, he would just turn it up and drink. He swigged the cough syrup so quickly it took a second for him to realize that it was not cough syrup. While sputtering and making a terrible face he told me that I had given him black draught. 

When we told Dad about the mix-up he said, "It will probably help AB's cough anyway, because he will be afraid to cough."