You know you're old when...

the wild, crazy, rebellious music of your youth is now elevator music.

everyone you know is at least 15 years YOUNGER than you are.

the only thing you recognize under the hood of your car is the battery.

the highlight of your day is having a bowel movement.

you don't recognize the man in the mirror.

someone asks your name and you have to look at your driver's license.

you remember Betty White being young.

you remember military and commercial planes having propellers.

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Shoot the CPU, not the monitor