There is semen after RP in spite of a dry orgasm. RP causes the seminal fluid containing the sperm cells to move backwards, into the bladder instead of the urethra. This reverse path, is called retrograde ejaculation The movement of semen in a backward path into the bladder, rather than directly into the urethra and out of the body, is the result of damage to the muscle at the neck of the bladder. This might be what he is seeing coming out through the catheter.
The bladder muscle normally blocks the entrance to the bladder, causing the semen (fluid comprised of secretions and cells produced by the prostate gland and other sex glands and the testes) that comes out through the penis during ejaculation. When this muscle is damaged, the semen takes the path of least resistance and enters the bladder, where the fluid is expelled with the urine.
I would like to know exactly where this "semen" is coming from. In men, the vast majority (around 90%) of semen is seminal plasma – this is secreted by the seminal vesicles and the prostate. The thickness of the semen is created by the mucus that is added to the mixture by the bulbourethral organs, and this substance gives the semen its unique texture. RP means no prostate and no seminal vesicles hence there can be no semen. 30% of the prostate is muscular tissue providing some squeeze and pressure at ejaculation ------- no squeeze hence no ejaculation. Retrograde ejaculation in a man with no prostate and no seminal vesicle is not a possibility. Retrograde ejaculation can and does happen in men with their equipment in order. It usually occurs in men who have a faulty or very weak sphincter muscle at the top of the prostate which normally squeezes shut just prior to ejaculation.
Another titbit of valuable information.
If you can get your hands on a book " M16: The History of the Secret Intelligence Service 1909-1949" by Keith Jeffery" you will find a section detailing the use of semen as invisible ink. I quote a portion:
"In June 1915, Walter Kirke, deputy head of military intelligence at GHQ France, wrote in his diary that Mansfield Cumming, the first chief (or C) of the SIS was "making enquiries for invisible inks at the London University."
In October the same year he noted that he "heard from C that the best invisible ink is semen," which did not react to the main methods of detection. Besides it had the advantage of being readily available, The Telegraph newspaper reported.
A member of staff close to C, Frank Stagg, said that he would never forget his bosses delight when the Deputy Chief Censor said one day that one of his staff had found out that "semen would not react to iodine vapour."
Stagg noted that "we thought we had solved a great problem."
P.S. (I was going to add an article on the use of semen in cooking but thought it would be in bad taste)
Post Edited (BillyMac) : 1/16/2011 4:47:03 PM (GMT-7)