"Who can tell me the difference between a buffalo and a bison," the teacher asked.
Nobody knew. Try as they might, nobody knew.
"Alrighty then," the teacher said, "Your homework for tonight is to go home and find out the difference between a buffalo and a bison."
Next day, the teacher asked again. Little SueAnn shot up her hand. "Yes, SueAnn?"
"Well, my deddy sez ye cain't wash yer hands in a bufflo."