According to my word processor, "humour" is the British spelling. "Humor" is the American spelling. Therefore, since I live in America, I use the American spelling.

"Black and portentous must this humour prove," -- Romeo and Juliet, ACT I Scene 1

Jeanette Isabelle
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I'm not sure whose twisted idea it was to put hundreds of adolescents in underfunded schools run by people whose dreams were crushed years ago, but I admire the sadism. -- Wednesday Adams, Wednesday