The biggest problem is when people snatch at there ferret kits, because of fear of being nipped.
When young always let them smell the back of your hand and maybe a stroke or scratch before lifting them, once they know your sent problem solved, if they have been treated right.
There will come a time, on many occasions, that you will have your arm up to the arm pit, down a hole, and have to push past the ferret to retrieve the rabbit, without fear of getting nipped.