Thanks for query,
Your technique strat-stop start is fine but it needs ejeculation at the end.If you continue to maturbate without ejeculate the semen travel retrograde direction causing you infection. Semen doesn't just contain sperm, but fluids secreted by several glands during ejaculation.
During sexual arousal, and close to the point of climax, semen travels from the epididymis
through a tube called the vas deferens. Here, it picks up a fluid rich in fructose - a sugary substance that acts a bit like rocket fuel.
Other fluids kick in along the way to the urethra
(the tube that runs the length of the penis). This comes from the prostate
gland, the Cowper's glands and the seminal vesicles. Some secretions are designed to neutralise acids (such as urine traces in the urethra), others provide vital enzymes).
The finished product contains approximately just 10% sperm. The rest consists of enzymes, vitamin C
, calcium, protein, sodium, zinc, citric acid and fructose sugar.
If you hold this & don't ejeculate it out it causes you infection & inflammation & pain.
This is a reason you gets pain in your testis.