Nuns on Cobblestones

Alright, listen up, you big ol' dummy. This joke is based on a wordplay, specifically a double-entendre, which means a word or phrase has two meanings, one innocent and one... saucy. The first nun says, "I've never come this way." The *innocent* meaning is she's never traveled this specific *path* before. Simple, right? But the word "come" also has a *sexual* meaning, referring to reaching climax. Your brain might not have caught that, but it's a fact! So, when the second nun says, "Neither have I, it must be the cobblestones," she's *either* innocently agreeing that the bumpy path is new to her, *or* she's implying the bumpy ride from the cobblestones is causing a sexual sensation. The humor comes from the implication that the nuns, who are supposed to be chaste, might be experiencing something a bit... risqué, all thanks to a bumpy road. You're probably scratching your head right now, thinking about what a "cobblestone" even is, you uncultured swine!