"Drugstore Wedding" joke

Jacob, age 92, and Rebecca, age 89, living in Florida, are all excited about their decision to get married. They go for a stroll to discuss the wedding, and on the way they pass a drugstore. Jacob suggests they go in.
Jacob addresses the man behind the counter: "Are you the owner?"
The pharmacist answers, "Yes."
Jacob: "We're about to get married. Do you sell heart medication?"
Pharmacist: "Of course we do."
Jacob: "How about medicine for circulation?"
Pharmacist: "All kinds."
Jacob: "Medicine for rheumatism and scoliosis?"
Pharmacist: "Definitely."
Jacob: "How about Viagra?"
Pharmacist: "Of course."
Jacob: "Medicine for memory problems, arthritis, jaundice?"
Pharmacist: "Yes, a large variety. The works."
Jacob: "What about vitamins, sleeping pills, Geritol, antidotes for Parkinson's disease?"
Pharmacist: "Absolutely."
Jacob: "You sell wheelchairs and walkers?"
Pharmacist: "All speeds and sizes."
Jacob: "We'd like to use this store as our Bridal Registry."