Dirty Sweaty Feet Cleaned In Public

Im taking the slave for a walk in an abandoned industrial area on this terribly hot day. My feet are truly sweaty and as Im only wearing spin flops they got pretty dirty as well - so I determine to take a break and sit down on the stairs - where the slave will have to slurp them clean! I take off the sandal and make him eat my dirty sweaty foot soles and toes - then put the shoe back on and order him to lick the dirt shoe soles as well. Then its time for the second foot to get licked clean - and the second shoe as well obviously! But this time Im not only making him lick the shoe sole - but also the sweat-soaked inside!