Why does the poet say there is no one like macavity

Dear student,

Macavity was a mysterious cat. Tall and thin, with a domed head and deeply lined brow, Macavity was the master of all crimes--big and small. Be it milk, or jewels or an important treaty, Macavity could vanish it all and leave without a trace. Macavity was a genius--he could lick his thumb as easily as he could do long division sums.No rule or law, natural or man-made, could stop Macavity. The Scotland Yard had been unable to trap him. He always had an alibi, which would prove that Macavity was never present at the scene of crime at all. he was truly unique and that is why teh poet says that 'there is no one like Macavity'.

Regards