Questions of this nature can be difficult to answer and perhaps even more so to ignore. the reality is that other than diverting or adding a positive or humerous spin to the answer so that you don't offend others who are just "curious", there's no much you can do.

RInbar had a good answer so stick to something like that. But most importantly keep a positive attitude.  Remember "you will get what you desire the most", it is a fact of life, your mind makes it happen.

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