One day, while walking to the store, I passed by a nursing home.

On the front lawn were six old ladies lying naked on the grass...

I thought this was a bit unusual, but continued on my way to the store.

On my return trip, I passed the same nursing home with the same six old ladies lying naked on the lawn...

This time my curiosity got the best of me and I went inside to talk to the manager.

"Do you know there are six ladies lying naked on your front lawn?"

"Yes," he said, "they're retired prostitutes, and they're having a yard sale."

Er, does this qualify as a groaner?