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This is the reflex when you grab the glans and stretch it. At some point this reflex wants to pull the penis back toward the body. I don't have that reflex anymore. Does this mean that my ED is severe or is it not that significant that I don't have that reflex? I'm wondering if it can be brought back or if it is gone it's gone.

Yes, it can be brought back. It involves physical therapy to awaken those nerves and get them responding again. Interestingly, this is exactly what the Viberect does. There are exercises that go along with it that are just retraining that reflex. Like anything, it takes time.
Paul