"Wedding Gifts" joke

Jacob age 85, and Rebecca age 79 are all excited about their decision to get married. They go for a stroll to discuss the wedding and on the way go past a drugstore. Jacob suggests that they go in. He addresses the man behind the counter: "Are you the owner?" The pharmacist answers, "Yes."
jacob: "Do you sell heart medication?"
Pharmacist: "Of course we do."
Jacob: "How about medicine for circulation?"
Pharmacist: "All kinds."
Jacob: "Medicine for rheumatism?"
Pharmacist: "Definitely."
Jacob: "How about Viagra?"
Pharmacist: "Of course."
Jacob: "Medicine for memory?"
Pharmacist: "Yes, a large variety."
Jacob: "What about vitamins and sleeping pills?"
Pharmacist: "Absolutely."
Jacob: "Perfect! We `d like to register here for our wedding gifts."