Anticipation
The master sir is eagerly anticipating the arrival of his beautiful girlfriend so that he might embrace her and kiss her on the lips. The slave is equally anticipating the arrival of his master’s beautiful girlfriend so that he might kiss her on the boots.
When his dreams come true and he is permitted to respectfully kiss-greet her boots, his only frustration is that he has no way of knowing what colour of socks she is wearing inside those boots. However, with any luck, he will get to not only see, but also smell her socks later on this evening as he kneels on the dirty floor next to the master’s omnipotent bed with his impotent slave nose buried deep in his master’s girlfriend’s sweaty, discarded boots and socks whilst the master and mistress make love to one another high above him.