Mary used to say, when things would get worse, 'Why don't you talk to me, Joe?
Why don't you chuck up that dust-hole and go up country and settle on good land, Peter Olsen?
Why don't you tell me your thoughts, instead of shutting yourself up in yourself and brooding--eating your heart out?
Why don't you kick her off the bed and the book out of her hand, and make her go to work?
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "why don" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.