The cat waddled in, plump and friendly, making itself at home. When placed outside it yowled, pawing at the door.
"I guess we have a cat now," said the first human.
"I suppose we can afford it," relented the second.
"At least it's not six cats!"
"Yes."
Many nights passed, the cat was cuddly, purring up a storm.
One morning it did not show up for breakfast. The humans searched.
"I found her!"
"Her?"
"We... have six cats now."
"No!"