I read somewhere that tying a tight rubber band around the base of your cock and letting it get hard for awhile is a good penis enlargement technique. I tried it for just a few minutes and I got swollen and purple (and I could see where I busted some very small blood vessels), so I took it off because I got scared I was doing damage. The article I read was on the Internet, so who knows how accurate it is. It basically said that it had the same effect as jelquing...expanding the spongy tissue inside the penis by engorging it with blood. Does this work or is it dangerous?