When ferrets play with each other, they nip and play bit each other. A ferret that hasn't been taught any different will attempt to play with his human in the same way. Striking the ferret will not teach it differently-it will teach the ferret that people hurt. Scruffing and positive reinforcement are the best training tools. Ask your vet or a ferret shelter for more info.
Ferrets are very curious.
If they can get their heads into an opening, the rest of their bodies will soon follow. Ferrets who get out of the house quickly become lost and can't find their way home. Ferrets have been domestic longer than cats and have had the hunting and survival instincts breed out of them. They depend on us for survival. If a ferret has to choose between food and attention, the ferret will choose attention, to the point of starvation.