A little boy said:  "Mummy, why was Willie Winkie running round the town at night in a nightdress?"  Mummy said "It's called "cross dressing" today dear.  It's quite a fun thing to do.  But when Willie Winkie was a boy they called a man's nightdress, a nightshirt."  I see men still wear nightshirts, though.  (See photo).  Why do they not call it "cross dressing" when we women wear trousers?  I'd be lost without mine.  Suitable for all occasions and much more comfortable than hot tights.