It's not. I had a spare. Then I got married. Now I have no spare. Now I cannot afford another spare. All the sudden money for a spare gets spent on furniture and decor and such. bleh.

Better to have two spares. I had two spares once upon a time. The second spare can work as a loaner. You can give it out like a sample...sorta like being a drug pusher. Then when your friends get addicted, you can take it back and make them buy their own.