The Source of Her Confusion is That Her Ceiling is Covered with Postcards

Girl: Hey, how about this one? Have you heard the one about the ceiling?
Blonde: Um, no.
Girl: Oh, well never mind, it's *way* too over your head.
Blonde: No, tell me! I'm not that dumb!
Girl (shaking head): Never mind, you don't get it. Hmmm, what about the one about the postcard with no stamp? Oh, never mind, you wouldn't ever get it.
Blonde: Really, I think I could. Tell me, let me try!

Spring Grove, Pennsylvania