While shopping in a food store, two Nuns happened to pass by the beer section. One asked the other if she would like 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. 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 bag pretzels 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.'
p.s. I got this joke from a friend via email. I thought it was pretty good so I posted it.