1. In your teens: Comment on your best friend's sepia-colored profile picture.
In your twenties: Rarely comment on profile pictures because you don't want to seem overly excited about something so trivial.
2. Teen: "Like" or comment on most of the statuses that flood your newsfeed.
Twentysomething: Scroll through statuses because you don't have energy to read three paragraph rants.
3. Teen: Write on someone's wall to see how they're doing.
Twentysomething: Inbox someone a message and avoid PDA on the timeline.
4. Teen: Send your friend a bumper sticker that totally describes your relationship.
Twentysomething: Send your friend a GIF that totally describes your relationship.
5. Teen: Upload an album from your BFF's surprise party with a digital camera.
Twentysomething: Upload just one selfie from your BFF's drunken surprise party with your smartphone.
6. Teen: Put a Dave Matthews Band lyric in your bio section for some flavor.
Twentysomething: Try to prove to the masses you're sophisticated by just leaving your birthday and alma mater in your bio section.
7. Teen: Friend request everyone you meet, even if it was for 10 seconds during lunch in the cafeteria.
Twentysomething: Wait to friend request someone because they know you searched them and then stalked your life and GAH.
8. Teen: Wish all of your friends a Happy Birthday with a Graffiti drawing.
Twentysomething: Check your friendship and see if that person wished you a Happy Birthday last year. If not, ignore.
9. Teen: Everyone can scroll through your tagged pictures from birthday parties and homecoming events.
Twentysomething: Make your tagged pictures private. You don't want your Facebook friends to see your drunken fail from last Saturday night.
10. Teen: Record a silly video on Photobooth and share it on your friend's wall.
Twentysomething: Send your friend an embarrassing double chin selfie in a private inbox only.
11. Teen: Accept every single friend request from your high school peers.
Twentysomething: Be more selective with accepting friend requests, even if they sit next to you at work.
12. Teen: Make a corny status to fit the classic "is" complex.
Twentysomething: Check into your Sunday brunch location on Foursquare.
13. Teen: Post a YouTube video of "Crank That (Soulja Boy)" by Soulja Boy Tell'em.
Twentysomething: Shamelessly share a Spotify playlist of your favorite music.
14. Teen: Always be available on Chat to talk with anyone about homework, hookups, and TV shows.
Twentysomething: Stay offline on Chat so you won't be bothered when Facebook stalking.
15. Teen: When it's your best friend's birthday, you write an all-caps message on their wall with an endless amount of exclamation points.
Twentysomething: When it's your best friend's birthday, you share an Instagram picture of a legendary moment from your friendship.
16. Teen: Find the pictures of babies on your newsfeed super cute, and react with an "Awwwwwww!"
Twentysomething: Find the pictures of babies on your newsfeed bothersome, and react with an "Oh, god."
17. Teen: Block your high school peers you only ask for homework help from your newsfeed.
Twentysomething: Unfriend your old high school peers and feel a big sense of relief.
18. Teen: Poke someone to flirt and have super cute fun time.
Twentysomething: Poke someone to flirt and have super cute fun time.
