The High Chair is a fun rear entry sex position, where you get to sit and relax while your man does most of the work. To set it up, you are going to be sitting down on the bar stool with your butt hanging out over the edge. So really you are going to be sitting on the underside of your thighs, not your butt. Your man will enter you from behind. You can then lean forwards away from your man or backwards into your man to find the right angle. If your man is not tall enough to penetrate you, then get him to stand on something firm.