A rook piercing is made through what is called one's antihelix, which is one's inner curvature that tapers downward just below one's upper cartilage curve from the top. It's a flattened out, curved surface that can have a piercing go through the cartilaginous bone, and is an incredibly painful procedure to undergo for many. Those who are able to take the pain can very well sit and take the piercing punctures, but those who aren't prepared, will have to brace themselves for the pain.