Nuns And The Parrot

Three nuns passed every day through a street that led them from Church
to a Reformatory. They noticed a parrot that stood at the entrance of a
big residential house. Every time they passed in front of that house,
the bird would pronounce three sequential colors. One day, they heard,
"Yellow, blue, black." One of the nuns noticed that those colors
perfectly matched the colors of their underwear. She mentioned her
discovery to the other two nuns, but both were reluctant to believe
that could be possible.

The next day, they all wore black underwear and passed in front of the
house, and very precisely the parrot spoke, "Black, black, black."

Hearing that, the three nuns were astonished. One of the nuns spoke up,
"Girls, tomorrow we are going to trick that bird." After saying that,
she recommended that the next day, none of them should be wearing any
underwear under their vestments.

Respecting their agreement, the next day they wore no underwear, and
proceeded to pass in front of the parrot's house. They peeked at the
bird.

At the beginning, the parrot looked a bit puzzled. He swung back and
forth on the cane he was perched on. Then, after a while, the Parrot
spoke, "Straight, Straight, Curly!"