Cut the Mustard

The makers of well-known French Mustard have issued the following statement:
“We at ****** wish to put an end to rumours that our product is made in France. There is no relationship, nor has there ever been a relationship, between our mustard and the country of France. Indeed, our mustard in manufactured in England. The only thing that France and our Mustard have in common is that they are both yellow.”
What’s the difference between a neurotic and a psychotic?
A psychotic says, “Two plus two is five.”
A neurotic says, “Two plus two is four, and I can’t stand it.”