Seems like it would be awesome, until it eventually kills him.
You know that doesn't matter how friendly you are with such animals, They are wild and have a dangerous nature. I don't say he\she will kill ya but any mistake costs your life.
True, though that's less frequent if you raise the baby animal by yourself.
Of course, They have a less wild nature, But still dangerous.
Polar bears are mostly calm.
until they maul your face