For those of us who are determined to defend 'Political Correctness', bear this in mind:
>>The philosopher Steven Pinker coined the phrase 'the euphemism treadmill' to describe the process in which euphemistic neologisms acquire all the negative associations of the words they were coined to replace.<<
Source:-
http://en.wikipedia.org/wiki/Sapir-Whorf_Hypothesis
For the sake of clarity, a euphemistic neologism is a new word created to subsitute for an existing word considered too harsh or offensive.