"Wrong Side of the Bed" joke

A young priest gets up in the morning and goes to breakfast. On his way there two nuns look at him and he says, "Good morning sisters."
And they reply in a sing song manner, "You got up on the wrong side of the bed this morning."
This stuns the priest who thought he had been very polite but he just goes on. He encounters a Brother a little while later along the way and he says,"Good morning Brother."
The Brother replies in a sing song voice, "You got up on the wrong side of the bed this morning." The priest looks confused at all this but goes on.
He gets a little farther and he comes across a fellow priest and he says, "Good morning Father."
The priest replies in a sing song manner, "You got up on the wrong side of the bed this morning."
Now the priest was mad. He continues his walk to the dinning hall not saying a word to anyone. The Bishop sees him and says, "Father..."
The young priest was not going to take any more even from the Bishop. He looks at the Bishop and says, "No I did not get up on the wrong side of the bed this morning!"
The Bishop looks at him stunned and says, "What?"
The priest realized his mistake and said "I am sorry your Holiness, what is it you want?"
The Bishop looks at him and says, "All I was going to do was ask you why the hell you have on Sister Mary's shoes."