reason/why - The reason why . . .

Often times, you have read and heard so many expressions beginning with "The reason why . . .' Even, most native speakers are fond of this. But you would be surprised if I told you that it is wrong using the two words together! Check out these two sentences:
 

The reason why I like it is because it is cheap.
The reason I like it is because it is cheap.

You will observe that the second sentence can stand alone without adding "why". So also can the sentence be constructed without adding "reason" e.g.

Why I like it is because it is cheap.

Note that "reason" means a basis or cause, as for some belief, action, fact, event, etc. while "why" means the cause or reason. So, you can see why it is wrong to use the two words together!

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