This will be your butt-plug; try to fix it to the belt so you cannot take it off without taking off the belt. To solve the obvious problem that this plug will create, you will use
these as your underwear from now on (Get rid of any male underwear). You will be allowed to wear
these on top if you want.
Finally you should get an enema-set, just in case you get too constipated to use your plug at some point.