Like many others here, my masturbation technique has grown and developed over the years.
I started age 10 pulling on panties and cumming in them, which felt so good. Then I learned to jerk my cock to make myself cum - usually whilst wearing panties and other lingerie.Then I discovered sniffing panties and probing my asshole (with fingers, candles, brush handles, bottles and toys) whilst wanking.
During these early years, I found wrapping things around my cock and balls very pleasurable, using stockings, belts, rope etc. The added tension of something wrapped around my erection (including panties) as I masturbated, incredibly thrilling. I soon discovered that anything round my balls or cock made me feel good and I enjoyed the extra rigidness it brought to my genitals. I began making the tightness a point of stimulation when the tethering bordered on the painful, but made my ejaculation all the more glorious. Rope and string became the method for achieving a painfully throbbing shaft and cold stretched balls as I wanked for ages, till I could stand no more and shot my spunky load.
My first commercial device was given to me by a friend who didn't want a leather studded arab strap he had. The feeling of the ball and cock strap holding me firmly as I wanked, was a revelation, and I also loved to wear the device under normal clothes when out and about, for extra stimulation. I also loved that fact that he knew how much I enjoyed masturbating in his donated equipment.
When I purchased my first (and soon after second) steel cock ring, I knew I had found the device for me. Pulled over a limp penis and soft hanging balls, the steel felt fantastic against my shaved pubis, and I love to wear it for hours (and sometimes days) at a time. Invariably, I have a semi erection a lot of the time with it on, and the only way of removing either or both, is to make myself cum. I love the way it makes my cock and balls look bigger and it makes them stand out a little when wearing panties.
Whilst masturbating with these steel cock rings on, I discovered adding more rings to my balls to stretch them and add weight to them as I wanked, made for an exciting addition as I jerked my cock. I found that I could get up to a dozen rings round my testicles, stretching my scrotum in an excitingly painful way that also had them go extremely cold as I pulled furiously on my dick.
I now recognise that, at times, pain is linked as part of my pleasure, and I enjoy putting myself through increasingly challenging situations - like tying extreme weights to my rings to pull on my balls as I wank, or whipping my cockhead, shaft, balls and asshole inbetween long sessions of masturbation.
My most challenging and extreme development to my CBT wanking, is ball busting. This is where I spread my legs and have someone knee or kick me as hard as they wish in my bollocks, with the aim of causing me as much pain as possible. The body shattering pain is incredibly shocking and debilitating , but after a period of recovery, the sweet release of a spunky ejaculation afterwards, is a massive release, as I milk my shaved sissy penis with tears in my eyes, as they watch me cum.
It is an extreme work-out for my body, but one I plan on indulging in from time to time.