One day this mechanic was working late under a vehicle and some brake fluid dripped into his mouth. "Wow! That stuff isn't too bad tasting," he thought.

The next day he told his buddy about tasting the brake fluid. "Not bad," he said. "Think I'll have a little more today." His friend got a little concerned but didn't say anything.

The following day the mechanic told his friend about drinking a cup full of the brake fluid. "Great stuff! Think I'll have some more today." And so he did.

A few days later the mechanic was up to a bottle a day, and told his friend, "This brake fluid is really great stuff." His friend was now really worried. "You know that brake fluid is poison and really bad for you. You better stop drinking that stuff."

"Hey, no problem," the mechanic replied. "I can stop any time."