My little girl (Slinky) is the same way.  I also performed the same
experiment but I gave up after four minutes.  I guess some ferrets are
kissers and some are not.
 
Joe
Slinky "Hey, lets climb onto the bed and under the covers for our nap"
Pale Face "Right, and when he gets into bed we can ambush his feet"
Slinky "KEWL!"
[Posted in FML issue 2643]