Have you ever left an empty shoe box out and returned to find your dog curled up inside it? Maybe you went to put fresh flowers in your vase only to find a cat already occupying it? Did you buy your favorite animal an expensive Tempur-Pedic pet bed, only for her to sleep in a bowl on your kitchen table? You are not alone. Except for the Tempur-Pedic pet bed.

Cats and dogs really love small spaces that are not meant for them. They love them so much that the meme, "If It Fits, I Sits," was coined to describe their love of snuggling into tight spaces.

According to knowyourmeme.com, the phrase is a wordplay on the USPS commercials promoting their "If It Fits, It Ships" campaign, and was first used to describe a cat sitting in an egg carton. One thing is clear, by USPS standards most of these pets would not "ship."

Watch our compilation above of cats and dogs doing what they can to get their snuggly fix.

Song: "Blue Sky" courtesy of Groove Addicts, from the album "He And She Singer Songwriter"

(EDITOR'S NOTE: This post was updated to correct that it was the USPS, not UPS, who made the commercial referenced above.)

Also on HuffPost:

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  • I Love Shoes!

  • Wink, Wink

  • These Two Always Butt Heads

  • All Mine!

  • Fur Ball

  • The Antisocial Dog

  • Letting It All Hang Out

  • Something On My Face?

  • Are You Looking At Me?

  • Spot Is Very Serious

  • Beat Bulldog

  • Happy Hounds

  • Can I Come In?

  • Play With Me

  • He Lives Every Week Like It's Shark Week

  • Forgive Me

  • It's A Dog In A Box

  • The Cool Dog

  • The Baby

  • This Is Love

  • Monkeying Around

  • Ready For Vacation

  • Snow Angel Fail, But Cuteness Success

  • Like Father Like Son

  • Hold Me

  • For Me?

  • On Our Way To A Birthday Party

  • Sunsets Really Puts Things Into Perspective

  • He's Into Heavy Metal

  • He's Got A Green Thumb

  • Party Pups

  • This Rainbow Is Freaking Me Out, Man

  • I've Earned This

  • Camouflage Canine

  • Dreaming Of Dog Food

  • Who Are You?

  • You're Home!

  • It's Been A Long Day

  • Car Rides Make Me Sleepy

  • Bundled Up

  • They Love Their Wine

  • Eskimo Kiss

  • Precious Puppy

  • Do These Look Too Big?

  • Don't Leave

  • Daredevil Dog

  • Someone Forgot Something In Aisle 5

  • Master Of The Downward Dog

  • Proud Momma

  • Hot Tub Time

  • Go On Without Me