Nurses Nina and Suzie have been preparing patient X754, a volunteer for sperm medical trials, for the last month. He has not been allowed to ejaculate and has been subjected to continual teasing and stimulation as part of the experiment. Today is the final day of his ordeal, so the nurses do a full examination before proceeding to fondle and stimulate the balls, prostate and cock for the last time. Nurse Suzie mounts the cock for additional invigoration and then moves the patient into the milking position to harvest the cum load.