Sure signs that you're getting old...

A) When you crinkle your forehead for any reason, it stays in the same place for a few seconds longer than it should.  (Wrinkles!)

B) One morning, your eyebrows suddenly appear to be taking over your face.  (Really?!? Is this possible?!?)

And then, most importantly of all,

C) Your younger siblings start to have babies:

Congratulations to Keith and Marisa, and welcome Baby Kooistra--we can't wait to meet you!