Well if you dont want it to wash out so easily this is what you do...
step 1- Lube it to the fullest extent.
step 2- Shove it in the anal region.
step 3- Tighten the butt cheeks together.
step 4- Retrieve a staple gun.
step 5- Hold on for dear life.
step 6- Pull the trigger, and staple the cheeks together.
step 7- Finally finish of with atleast on strip of masking tape vertically along the crack. Yo seal it in place of coarse
There ya go you silly faggot!!!