While shopping in the grocery store, two nuns happened to walk past the beer cooler

One said to the other, “Wouldn’t a nice cold beer or two taste wonderful on a hot summer evening?”
The second replied, “It would indeed, Sister… but I’d feel uncomfortable buying beer. I’m sure it would cause a scene at the checkout.”
The first nun smiled and said, “I can handle that.” She grabbed a six-pack and marched to the register.
The cashier looked stunned as the two nuns stepped up with the beer.
“We use it to wash our hair,” the nun said with a straight face. “It’s a sort of shampoo.”
Without missing a beat, the cashier reached under the counter, tossed in a pack of pretzel sticks, and said,
“The curlers are on the house.”