A homeless wino went into the doctors office for an infected foot... The doctor treated the injury, but before letting him go, he asked his patient to stay for a small demonstration. The doctor brought out a tray, which held a bowl of worms, and two glasses - one full of milk, the other of whiskey. The doctor set the glasses on the table and told the wino ""now, watch what happens when I put a worm in each of the glasses"". He dropped a worm into the glass of milk - It swam around He then dropped a worm into the glass of scotch - It died. The doctor then looked at the wino and asked ""Does this signify anything to you?"" The bum blinked and answered: ""Yup, you can't get worms from drinkin' scotch!""