He said to the shrink, "I am very anxious about my son's condition. He thinks he is a duck."
The shrink asked him, "Since when has he been displaying such behavior?"
Mr. Pereira replied, "Almost 6 months I guess."
The shrink exclaimed, "My god, why didn't you see me earlier about this problem?"
Mr. Pereira replied, "I am ashamed to say this. But we needed the eggs."