Even thought this session with a new patient didn't result in a full release, the Sybian did a nice job of milking his prostate to produce seminal fluid (pre-cum). Shortly after mounting the Sybian and adding substantial vibration his cock got hard and started bouncing up and down. This is caused by the rotation of the Sybian head as it passes by the prostate. He asked for hand stimulation but I always like to see if the can ejaculate hands-free first. If they need a little extra stimulation I will hand milk them or apply some vibration just under the head. This was a new experience for him so I'm sure we'll get a full-release next session.