e-stim for milking and safety?

Hi there, This is my very first time posting here. A brief introduction seems appropriate. I am a wife to a husband who has been asking me to keep him in chastity for quite some years now. We have attempted it before, but he always found the device uncomfortable. Since I dislike seeing him suffer that way, we decided to stop. But this time… he has worn his CB3000 for several days, and despite the unit breaking down (what else is new reading these forums?;) ), we really enjoyed ourselves. I have since purchased an Exobelt Extreme and a CB6000S, and I am determined that at least one of them will work. However, when it works, safety remains my priority. I’ve heard that milking is beneficial for him. Since this appeals to me, I started searching for answers. I watched a video featuring a man in a CB6000S who achieved climax using e-stim with two electrodes: one partially inserted into the top of the cage and another resting on his scrotum. As a woman, I’m unsure whether this type of orgasm is pleasurable for men. Will he feel satisfied afterwards, or will it just be milked? And does this stimulation method truly work in reality, or was that video an exception? I am not a native English speaker, so please forgive any errors; I am doing my best. Best regards, Jenny