A customer walks into a pharmacy and asks assistant for an anal deodorant. The assistant explains that they don't stock them. The man insists that he bought his last one from this store. The assistant passes man on to the pharmacist, who explains that store has never stocked such an item. The man explains he bought his last one from this store only weeks ago and has done for several years. The pharmacist asks man to bring in his last purchase and he will try to match the product.
The following day, the man returns to the pharmacy and shows the deodorant to the pharmacist. The pharmacist asks why the customer thinks this is an anal deodorant, when it is obviously of the underarm stick variety.
The customer explains that instructions on reverse state, "Push up bottom to use."