Can you think of something that existed in your lifetime that automatically ages you? Example: pay toilets.(Yes, I remember them.)

When I was in Junior High School (circa 1957), a slice of pizza and a coke was 25 cents.

Street games called Johnny Ride the Pony, slug (a form of handball), hop scotch, ball 'n' jacks, Skully.  

You needed a key to tighten your roller skates to your shoes (and you used the skate key to throw in hop scotch).  

Black and white saddle shoes worn with bobby socks, crinolines worn under your poodle skirt to make it stand out.  

No helmets, knee pads or any other bubble wrap when you rode your bike.  

Blockbuster video stores. 

I can just barely remember (full size) Hershey Bars being $0.05 at the local convenience store.

Other people being stupid all of the time and subjecting me to it. That'll age me quite a bit.

The Sun.
I didn't start wearing a hat until my early thirties.
I now look ten years older than an English person of the same age.

They are still found in European countries.  I haven't seen one here in a long time.   

I remember separate water fountains for black or white people to use.  It's a faint memory; stronger is the memory of my mother's explanation to me when I ask that childish question:  Why?  

A Halloween Mask and formaldehyde embalming fluid......:(

Mummification or Daddification if you're embalmy enough to try it..   :( 

Carbon Dating for old fossils that still have blood surging through their veins and still wish to carry on with their obsession of populating the world single handed.....hehe....
They belive it can't be achive in a stroke with the aid of modern medication that came from out of the blue one day..... :(CD 

I'm old enough to remember pay phones, VHS tapes, dial-up internet, and when people called it a "cellular phone". :P

33, 45 and 78. The fact that I even know the relationship between those numbers ages me.