Trying My New Milking Attachment - Ruined Orgasm

I have two new toys for my vibrator, this is just the first one I'm trying out..  I want to test it out on my slave and see what he can handle..  Manually flipping the switch on and off when he gets close to an orgasm, just to see what he can take..  Oh, I'm in my new thigh high latex boots, latex dress, and gloves..  How long do you think you could last before getting ruined?  Less than ten minutes I bet.. Hehe