For those cayenne pepper enthusiasts put some vicks vaporub in a bowl and mix in a tablespoon of cayenne powder.
Prepare the subject: show your dominance by undressing them yourself. Sit down on the bed and place them stomach down over your knees with one of your legs holding theirs down. Take their hands and cuff them behind their back. Next start spanking them as hard as you can and when the crying starts, put a pacifier in their mouth. Give them 10 more spankings for good measure.
Now that they are ready, put a rubber gloves on. Use one of your hands to spread the buttocks while putting weight down on that same arm to restrain them.
With the other hand coat the glove with generous amounts of cayenne mixture, especially the middle finger. The amount on the middle finger is for the inside of the rectum, what's on the glove is for the buttocks.
Once applied, give them a fleet enema and diaper them. Wait 20 minutes before changing them.