Back in the late 1970's I came across this one ...

Woman is not PC because it contains "man" which is male...

----> man to person

--->>> Woperson

Wait, Woperson cannot be PC, as it contains "son" which is male...

-----> son to one

---->>>> Woperone

:-)

I think it was in the Uni Qld Student paper, which was then reasonably good...

Robin