A woman and her friend are visiting the zoo. They are standing in front
of the big silver back gorillas cage when one woman makes a gesture that
the gorilla interprets as an invitation. He grabs her, yanks her over the 
fence, and takes her to his nest in the pen. There he ravishes her and 
makes passionate love to her for about 2 hours till he is tranquilized, 
and the lady taken to hospital.

Her friend, deeply concerned, visits her the next day. "Are you hurt?"
she asks.

She replies, "Of course I'm hurt! He hasn't called! He hasn't written!"