Scientists have conclusively proved that the most satisfied a human can be is when it has removed all the grit from under its fingernails, provided there are no oranges in the vicinity.
By rubbing in a tablespoon of lemon juice, a tablespoon of malt vinegar and a tablespoon of single malt whiskey to a stain on white or pale fabric, one can easily add three new types of stain to one's laundry!