You're such a lucky boy to may get this training! Worship My beautiful feet and lick the spit of My sandals, thinking it is the sperm of some other slave, or maybe My lover...
Hahaha, I like to humiliate you this way!
So do what I say. Worship My sweaty feet and lick My worn full-of-spit sandals.
You are My foot slut!

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Light soles and toerings - foot slave training