Try a mouthful of curry pepper, Lemon.
Now, start a thread asking why it burns your tongue.
Whisky contains alcohol, myboy. Your tongue is full of taste and pressure receptors. What do you think happens when you pour alcohol on it?
Just because it's legal for you to drink whiskey doesn't mean you should - in large quantities, at least.
Drink enough and you'll be able to answer all of your own questions!

(not correctly, but will you care?)
Cheers
Mick