Miriam has never been on a cruise before. One day, she meets her friend Leah and they stop for a chat.

“So where are you and Simon going for your holidays this year?” asks Leah.

“I’d like to try out a cruise, Leah,” replies Miriam. “But I’m not sure whether Simon and I would enjoy ourselves. We’re almost 70 now and Simon thinks cruising is for younger people.”

“No, you’re wrong in thinking that, Miriam,” replies Leah. “Most cruise ships have special design features just for senior citizens.”

“So give me an example, already,” says Miriam.

“Well,” replies Leah. “They have bifocal portholes.”