Related:

• You are only young once, but you can stay immature indefinitely.
• You maybe only young once - but you can be childish all your life.
• Minister, have you finished with that re-drafted re-draft of the draft proposal yet?
  No Humphrey, do you need it back? Yes minister, I'm afraid it needs re-drafting!...
• If you smoke after sex, you need lubricant.