I got a postcard from my gynecologist. It said, "Did you know it's time for your annual check-up?" No, but now my mailman does.

A stand-up joke built on embarrassment and privacy norms. The setup—receiving a postcard from a gynecologist—immediately signals an inappropriate level of public exposure, since postcards are readable by anyone handling the mail. The punchline pivots from the speaker’s own knowledge (“No”) to the mailman’s (“now my mailman does”), highlighting how institutional routines (appointment reminders, marketing) can collide with intimate medical confidentiality. The humor comes from incongruity (a casual postcard for a sensitive specialty) and from the social taboo around discussing gynecological care, which the joke deflates by making the breach of discretion the real target.