Chubby sissy slut..In.. 2 hard 2 get it in... 1 of 2 parts

it's time to have my chubby sissy slut to wear a "chastity device".
i want complete control. Try as I may my chubby sissy slut's cock is too hard to get the device on on.
i try wrapping his cock in an ice pack. Still hard.
i ***** him to ejaculate & he gets soft enough to stuff his cock in the chastity device.
i put the lock on and keep the key.
he's diapered & he's sent home.

when he returns the diaper is on but the device is off.
i have to start all over again.