Some pictures would be helpful in evaluating exactly why the foreskin stays behind the glans. My suspicion is, like Kylar said, that you had a mild paraphimosis, which prevented the foreskin from re-covering the glans. If it hasn't caused problems in 5 years, I don't think you have anything to worry about. And many of us here would consider you lucky for having achieved this state of permenet retraction without any effort. But if you really want to try getting the foreskin back forward, over the glans, here are some general suggestions. Again, pictures would help us be more specific. But I'm guessing that the tight phimotic ring of the rigid band is probably buried in the folds of the foreskin, and not easy to see or reach for stretching. My first suggestion would be just to squeeze the glans tightly with your fingers, while pushing the foreskin forward, over the glans. By squeezing the glans, you might be able to make it temporarily small enough to "pop" the tight ring of the foreskin over it, and move it forward. If that doesn't work, and you need to stretch this ring a bit first, then you should probably pull the foreskin back, toward the base of the shaft, as far as it will go. By doing this, you will probably be able to reveal the tight area, which will show up on the shaft, as a section that's narrower than the rest. You might then be able to pinch this section of skin with your fingers, on either side of the shaft, and stretch it horizontally for a minute or two, several times a a day, until it gets wide enough to push over your glans when you squeeze it, like I said before. Applying a steroid cream to the constricted area might help it to stretch out faster. Keep is posted on what you do and how it goes.