Related:

• To remove dust from the eye, pull the eye down over the nose.
  -- Actual excerpt from student science exam papers....
• Blood flows down one leg and up the other. -- an actual excerpt from student science exam pape
• Parallel lines never meet, unless you bend one or both of them.
  -- Actual excerpt from student science exam papers....
• Artificial insemination: Copulation without representation.
• Phoebe: Today we're gonna start with some songs about barnyard animals.
  [singing] Oh, the cow in the meadow goes moo, Oh, the cow in the meadow goes moo....
• Manure comes from a bull. Womanure comes from a cow.
• Service: 1) What a bull does with a cow. 2) What the Phone Co. provide
• Final exam in philosophy: "Prove that the chair on the desk does not exist".
  Student turned in "What chair?" and got an A....
• Bad Cow Jokes: Terry Bull