Experience with possible venous leakage, and some hope.
This is me sharing some of my experience. This has brought me hope. I hope it can do the same for anyone else.
I am no doctor, or expert in anatomy, but here is what I have experienced.
My erections are easy to come, but without direct stimulation they may disappear quite soon, perhaps only a few seconds before I feel the decrease in hardness coming in, this is also dependent on the position that I am lying.
With that knowledge, one time I was inside of a shower. I was squatting down in a frog like position, that is the natural squat position. I was getting an erection and for some reason I decided to explore my anus with my finger (Not my usual way of stimulation, since I am straight, but quite curious about anal pleasure) I put my index finger inside, while my penis was got erect. I I took my finger out because it felt rather tight, and I stood up immediately, surprisingly finding that my erection would not subside like usual. It stayed straight out and firm, I could walk around and turn in the shower and it would not fade. I was surprised that standing up, my erection was lasting. (Usually while standing, my erections may start to decrease in angle and hardness within seconds). However this time it stayed firm involuntarily. This led me to believe that my initial problems with lasting erections had to do with the pelvic floor and the PC muscle, whether or not too tight or too lose, which ever problem may be the case, this experience gave me much hope.
For now, that is all I have to report, but I will update when I find out more.
Hope this brought some light into the venous leakage dilemma.
Wish you all the best.