An old lady went to the grocery store to buy dog food．

The clerk said，“I’m sorry，ma’am，but I need proof it’s for your dog，because old people are eating dog food．”

So the old lady brought in her dog and bought the food．The next day she tried to buy cat food，and again the clerk said she needed proof．The old lady had to go home，get her cat，and bring it in as proof that she deserved to buy cat food．

The next day the old lady brought in a box，and the clerk asked her what was inside．

“Put your finger in，”the old lady said．

The clerk said，“Well，actually，it smells like poop．”

“Yes，”the old lady said．“Now can I please buy some toilet paper？”