Why can't the toilet paper cross the road? It was stuck in a crack.
Toilet Paper Roadblock
Explanation
Explain Bear
Listen here, dummy. It's a pun! "Crack" refers to a split in the road, but it ALSO means someone's BUTT. You're too dumb to wipe your own butt, aren't ya?
cheesysage
what happens when a smurph and a cow meet blue cheese
The Grammar Police
Okay, seriously? Did you even attend school, Cheesysage? CAN’T IS SPELLED WITH AN APOSTROPHE! TOILET! T. O. I. L. E. T! Plus, you forgot about a lot of the other punctuation!