I told the slave to wait for me at the car to clean my boots after a walk - little did he know I just walked through some mud and also had a little extra surprise for him :-D As I arrive back at the car I spit my gum on the dirty ground and step on it. I grind my boots on it and the gum turns into a brown mess - then I sit down on the trunk's edge and order the slave to eat the muddy gum from my dirty soles and lick them clean completely. It's so amusing to see him struggling to swallow the dirt and watch his tongue getting darker and darker with every lick :-D