Nice to hear again and again

A student called up his physics professor..his wife picked up d phone n said "he died last week"
..
Next day student called again..
She again pickd up n said "I told u, he died last week"
..
......He called d third time..
Wife said "he died.. y do u keep on calling again n again??"
..
..
Student: "Nice to hear again and again"