ok, I think this is good. Empty 3/4 of the can in your ass. What you have left is the only cream you can use to shave your pubes, ass and head. Use only one blade too. Hope you don't run out of cream!
Go to any store. Go to the aisle with grooming items. Remove the plastic cap from every can of shaving cream and stack them in a pyramid on the floor. If a store asks you what you're doing, tell them your "shaving" time from your busy schedule. If they ask you to leave, go to the next nearest store and do the same thing.
The dare is not complete until you are able to remove the cap of every can and stack them before being questioned by a store clerk.