Response to my question:
They do have valves. Not each of there articles is written perfectly…but what worries me that the MERCK article(http://www.merck.com/mkgr/mmg/sec14/ch115/ch115b.jsp) is obviously wrong. “Venous drainage occurs through venules below the tunica albuginea. Unlike other venous structures, penile venules have no valves; these venules close by compression against the tunica, as the corpora fill with blood.”
Maybe it is just written superficially and they didnt mention the few veins containing valves? There are also anastomoses, connection between the venous systems (deep, superficial) that make it harder for me to understand how closing the venous system (keeping up the erection) works.
“The veins leading from the penis have funnel-shaped valves that reduce the outflow of blood. As the erectile tissue begins to enlarge, the additional pressure causes the veins to be squeezed against the surrounding fibrous tissue, and this further diminishes the outflow of blood. Essentially, blood becomes temporarily trapped in the organ”
“In this theory, the “push” on the small closing valves of the veins is stronger than the veins’ ability to resist. As a result, the veins are not able to “close” tightly enough to stop blood from passing out of the penis, causing difficulty in maintaining an erection.”
Well, it’s a theory. But the theory is about the mechanism and not if there are valves or not. They clearly are there.
“Blood is pumped from the heart into the penis under great pressure and a series of valves keep it in the penis to maintain the erection. “
“It is the Peyronie’s plaque that causes the veins of the penis to not close properly. There are special valves within the veins of the penis that close off at special times, to trap the blood inside the penis – to create an erection. If the veins do not trap the blood, no erection.”
All written by MDs….
My goal: from 11.9 cm NBPEL to 18 cm NBPEL (~7 ") ...now or never...!!!! after 5 weeks(and a long break): 12.5 cm NBPEL