Food Chain
I am frightened of dogs - especially when they are watching me pay homage to their mistresses' footwear. For it must be abundantly clear to the animal who is at the bottom of the 'food chain': at the top - is clearly the mistress; then the dog; then me (unless there are any rats or insects around, in which case I am below them too!)
Fortunately, in the present case I appear to have satisfied both the mistress and her pet dog with my humble sneaker-kissing efforts - so I live to kiss feet another day!