Valves and PE.

I did a search and couldn’t find anything conclusive. I’m having no problems; I’m only curious as to where the valves of the the veins in the penis are located. What types of PE may damage them?

I saw that someone on here had problems keeping their glans hard; they could only manage keeping them hard by pressing on the dorsal vein. Do you think this person has damaged valves?

Again, I do not have any problems, I’m only asking this a future preventive measure.

I just found this post by Westla, which I apparently overlooked:
“An erection is maintained not by valves in the veins, but by the veins being compressed between two layers of fascia. At ejaculation an even harder erection is attained by the contraction of the bulbocavernosus and ileocavernosus muscles.

By squeezing the base of your penis you are putting pressure on the corpora cavernosa contained within the tunica albuginea. The extra pressure is much like that generated by the BC and IC muscles at ejaculation. The added pressure from above (your other hand) creates even more pressure on the tunica and, hopefully, causes it to expand to the point of micro injury and the repair of that injury is what helps it get larger.

So, to answer the question, you aren’t creating pressure against venous valves. The veins are already compressed when you get a “normal” erection. The pressure from the Horse squeezes is basically directed at the tunica.

Caution: Anyone attempting extreme erect exercises should have several months of PE behind them and be very slow and careful when starting these dangerous techniques.”

Westla, I hope you are correct.
Still though, where are these valves, I can’t find them in any diagram.