A young man strides into a chemist and asks for a packet of condoms.
The pharmacist replies: “They come in packs of three, nine, or 12. Which would you like?”
“Well,” the young man begins confidently, “I’ve been seeing this girl and she’s really hot. I want the condoms because I think tonight’s the night. We’re having dinner with her parents, and then we’re going away for the weekend. Once she has seen what I’m like in the sack, I reckon she’ll want me all the time. So you’d better give me a packet of 12.”
The pharmacist hands over the condoms, and the young man leaves, all puffed up and proud. Later that evening, he sits down to dinner with his girlfriend and her parents. Before they begin, however, he suddenly asks if they can say grace. The family agrees, but is taken aback when the young man continues praying silently for several minutes, once the grace has finished.
Eventually, his girlfriend leans over and whispers, “You never told me you were so religious.” The young man leans back and whispers, “You never told me that your father is a pharmacist.”