A Mars Bar walks in to a pub and says "Give me a pint! I'm the hardest sweet there is!"
A Twix walks in and up to the bar. "Give me a pint, I'm the hardest sweet there is!"
The mars bar walks back up to the bar and just looks angrily at the Twix.
With that the door to the pub opens and in walks a single mint. Both the Mars & Twix run into the toilets leaving their pints 20 minutes later, they both emerge from the toilets looking rather worried.
"Has the mint gone" asked the Mars Bar?
"Yeah, he drank both your pints and then left. Why did you run off? You both claimed to be the hardest sweets around!" said the barman.
"But he's menthol" said the Twix.