Intense Pyramidal Chastity Handjob ends up with Ruined Orgasm

I tease my slave by giving him a pyramidal handjob (1 stroke, then 2, then 3, etc) until he reaches 100 while he is smelling my sweaty feet. If he does, I open his chastity cage to give him a full orgasm. If he doesn't, he will only have a ruined orgasm inside his chastity cage and will lick my feet clean afterwards.