Pet shop

A woman passes a pet shop. Suddenly, she hears the voice of a parrot sitting in the shop window: "Hey you!"
The woman looks at him quite surprised. The parrot continues: "I have to chuck up when I see you!"
The woman continues on her way but she feels insulted. At her way home, the same incident happens again. Consequently, she enters the shop and threatens the shop owner to give notice to the police if this happens again. On the next day, the woman passes the shop again and the parrot says: "Hey you!"
The woman looks at him again. The parrot continues: "You already know!"