Ah, hedgehogs. They're always cute, but they're infinitely cuter when they're lounging in teacups or face-deep in a Dixie cup.
Domesticated African pygmy hedgehogs are sometimes kept as household pets (though they aren't legal in all states). And, for whatever reason, they really love sticking their faces into cylindrical objects like toilet paper rolls, a practice dubbed as "tubing" by the hedgehog owning community.
Tubing is safe if it's supervised, but you definitely shouldn't let your hedgehog stick its head in any small spaces when your back is turned. Small Animal Channel recommends cutting a slit down the toilet paper roll to make sure they don't get stuck.
Why do they do this, you wonder?
One hedgehog owner on Hedgehog World's message boards theorizes that their poor vision makes them misjudge the size of the tube and think they can fit all the way inside.
Meanwhile, another forums user noted that, "Maybe they can't find any good-fitting clothing, so they find the next best things: ill-fitting hats!"