Catholic Shampoo

While shopping in a food store, two nuns happened to pass by the beer.
The first nun said it would be nice to enjoy a beer.
The second nun answered that, indeed, it would be very nice to have
one, but that she wouldn't feel comfortable about buying it.
The first nun replied that she could handle that without a problem.
So, she picked up a six-pack and took it to the cashier.
The cashier had a surprised look on his face, so the nun said,
'We use beer for washing our hair; a sort of shampoo, if you will.'
Without blinking an eye, the cashier reached under the counter,
pulled out a package of pretzel sticks and placed them in the bag
with the beer. He then looked the nun straight in the eye, smiled, and said, 'The curlers are on the house.'