You think you have an iron dick so you decide it's time to submit yourself to Sydney's Dick Test. How does it work? You pay Sydney $1,000. If she breaks you, she gets to keep the money. If you don't tap out, you get your money back. You are very confident that there is nothing Sydney can do to make you fail the test. You don't even have a safety word agreed to. But clearly you haven't been submitted to her dick before. As soon as Sydney starts hitting your cock with a long wooden ruler, you realize you may have made a mistake. She knows exactly which spots to hit and how hard to hit it.