I wasn't going to say anything but really, a person should never be left locked/bound/restrained and then unsupervised; that is extremely dangerous because if something should happen there is no one there to help them. Also being bound for hours can be dangerous as well, if you don't have enough movement to keep blood flowing to the limbs you can cause serious problems. Not to say that you can't act out a lengthy bondage fantasy; just make sure to take the proper precautions first so that no one's health is in danger.