Whenever my uncle is offered something for free, he always asks, “Is it ‘free’ like a beer, or ‘free’ like a puppy?” The implication, of course, is that not all things billed as ‘free’ really are. Some things, like puppies, require a lot of upkeep, food, vet shots, and newspaper-covered floors, and may end up costing you quite a lot of money, despite originally being ‘free.’