Priapsim- an abnormal condition of prolonged or constant penile erection, OFTEN PAINFUL and SELDOM associated with sexual arousal. It may result from urinary calculi or a lesion within the penis or the central nervous system. It sometimes occur in men who have accute lukimia.
I hope Im not missing the point here but guys a priapsim really scares me. I find that just using clamps or leaving my dick in the vacuumed pump for long periods of time works very well.
If you stretch it, it will grow. If you clamp it, she will know.