For some people it doesn't feel good unless it hurts a little. For others, you have to hurt someone for it feel good. If these two kinds of people find each other it's a match made in Heaven! This is what bondage, domination, sadism (submission) and masochism is all about. An exchange of power in search of the ultimate sexual experience. When you're tied up and utterly helpless and the whip has landed on your ass so many times that the pain gives way to an euphoric adrenaline powered orgasm, you know what I'm talking about.