Two Nuns are running late for Mass.
Instead of wasting time on hailing a taxi, they decide to ride their bicycles while taking a shortcut which includes several back streets of the older part of Rome.
One nun peddles along and looks around at the unfamiliar territory, then leans over to the other nun and says, “I’ve never come this way before”.
The other Nun giggles and whispers, “I know what you mean. It’s the cobblestones!”