The Age When You Should Stop…

You know you're a "grown up" when you stop doing these things.

Thrillist has put together a pretty funny list of the ages you reach when you should stop doing things. Like by three-years-old, a person should stop sucking their thumb. Here are some other good ones.

By 10, a person should stop believing in Santa Claus. A workshop at the North Pole that employs elves to make stuff that shows up under the Christmas tree?

By 13, a person should stop writing in pencil.

By 14, the Trick-or-Treating should stop.

By 20, posters get framed and hung instead of being taped to the wall. Because a person can afford to and has more time for the difference. And talking about posters, they should become portraits, artwork or photos.

By 26, stop celebrating useless occasions, like Halloween and New Year's Eve. Are we in agreement that this whole "growing up" thing is becoming less and less fun?!

By 30, stop walking around with a backpack. Hey, I'm pretty sure Gibbs' team are all over 30 and they walk around with backpacks. Okay, so they do that mostly around crime scenes, but still...

By 31, a person should be doing laundry at their own place, not at his or her parents anymore. For obvious reasons. You're 31, do you really want your mom seeing your underwear. Or asking why there isn't any in your laundry? Yeah, exactly.

Check out the complete tip list, including what age you can stop worrying about being cool here. I think I'm going to have to pass on this whole "growing up" thing. If you're looking for me, I'll be in my blanket fort with my Halloween candy, writing out my Christmas wish list - in pencil!