The men's restroom smells like toothpaste--theorize

That one teeny, tiny, small guy lost consciousness during his post-lunch brushing, and fell to the floor with toothpaste tube still in hand. Unknowingly, the janitorial staff swept him behind the trash can, while he continued squeezing unconsciously.
Our corporate overlords have gone 'round the bend and are now forcing the cleaning crew to sanitize the bathroom with cut-rate toothpaste and soft-head toothbrushes.
After the recall, they had to throw away the "Toothpaste Greetings" line of condolence cards where children and small animals could not reach them.
Persons A, B, C, & D (all of whom brush their teeth at least thrice a day) all brushed their teeth at the same time.
Someone (who shall remain nameless) ate a gallon of toothpaste for dinner last night.
The vending machines are stocked with nothing but toothpaste (except for the Mr. Pibb button, which still cranks out Dr. Pepper).
The grout (which is not actually grout) is starting to break down.
The neighboring women's restroom had another "toothpaste party." The DVD will be available in two weeks for $29.99.
You put toothpaste up your nose.
In an effort to save money and conserve our natural resources, the Company now heats the bathroom by burning toothpaste.

(written in conjunction with Der Kraak)