But there is little hope for you ever doing good, you who are so accustomed to doing evil. Can an Ethiopian ¹  change the color of his skin? Can a leopard remove its spots? ² 

You are like a wild female donkey brought up in the wilderness. In her lust she sniffs the wind to get the scent of a male. ¹  No one can hold her back when she is in heat. None of the males need wear themselves out chasing after her. At mating time she is easy to find. ²