i have found this enema plug to be very helpful. All i have to do to use it is attach it to the hose of my double enema and let the water flow. the sphincter will keep the plug in so that all you have to worry about is 'is it done yet?' or when will Master disconnect me form it. the flow seems to help keep this attachment where it belongs without the use of someone's hand alwys making sure that it doesn't come out.