i did it because it was itchy

You know how when you give blood, they wrap that sticky bandage around your arm and tell you to keep it on for four hours? Well, today I found out why they want you to keep it on so long. If you only wait three hours instead of four, you might be greeted upon its removal by a spurt of blood from your vein that may or may not get all over your shirt and make you look like a sloppy heroin addict. It is most unfortunate that I learned this information through direct experience, instead of just reading about it in a blog like you did.