>>102334763
Enforcing and maintaining discipline. I don't think the girls should be necessarily subservient on the island, but they should not be needy, should learn to share and should not get into fights. The lack of clothing will make it trivially possible to tell who got recently spanked, which would he as much of a discipline tool as the spanking itself. After that we'll move on to punishments in public, and then eventually teach the girls that they can enforce discipline on each other themselves.