I first experimented with estim by accident.
I was aged 37, and had suffered from a lifting accident which caused severe muscle strain in my back.
My mother - of all people - lent me her TENS to help alleviate the pain. It was a basic over the counter machine purchased from the chemists.I found it ideal for pain relief, as it is meant to do of course…
Well, pervy me and my experimental mind thought about how it would feel on my penis.
I placed the adhesive pads, one onto the dorsal side of my penis at the base, the other behind the glans, foreskin covering the glans.
I switched on..and WOW! I played with the controls and I think it took well under a minute before I was ejaculating, it was incredible.
Now, I can hitch up my TENS, tie up my erect penis, take viagra, clamp the penis shaft and estim, in this position for maybe two hours or more. I feel I can no longer ejaculate solely from estim but need some hand rubbing to achieve orgasm.
Back in those early days of using my mother’s TENS, I liked the idea that when I handed back the TENS with the adhesive pads, some of my pubic hair was still attached, and also some of my semen was on the pad. It turned me on knowing my mother was to use the same pads on herself.
That led to another fantasy whereby my mother would use her TENS on me to punish me for using it to masturbate in the first instance, and she would insist on using the TENS on my penis to force multiple orgasms.