this joke takes place when Mario and Pauline first met. Any way...
Pauline had a parrot that could only say three words "who is it". No matter how hard she tried it refused to say anything else. One day she arranged that Mario would come over and fix a pipe that was leaking while she went out to do an errand. When he opened the door and came in, the parrot,senceing some one there said," who is it" to this Mario sarcasticly said,"its the plumber". The parrot not satisfied said again," who is it" and Mario answered again sarcasticlly,"its the plumber". The parrot STILL not satisfied said yet again,"who is it" and Mario answered again"its the plumber" with suprise in his voice. He then started running through the house looking for the person who kept repeating who is it.After hours of running through the house he finally fainted. At that moment Pauline came home and seeing the figure on the floor said," oh who is it". Which the parrot answered,"its the plumber".
