Tease and Denial in Boots for This Slave in Chastity Cage - Mistress Julia Femdom

My submissive has been locked in his chastity cage for some time. After buying a new pair of boots, I decided to see if his cock is still functional. A boot fetishist, I decide to tie him up to frustrate him before he takes care of it with his tongue and mouth. Then I release him from his chastity cage. That's when the result happens. His hard-on is gone. What better way to humiliate him than to confront him with this fact? So I let him rub himself against my boot... Before putting him back in his cage