Clever public urinal ad of the Day.

(click, via Marketing.ca)
Educational bladder relief!
The Vancouver Aquarium wanted to teach men that in the Syngnathidae family of fish, it's the males that get pregnant. So, they put up these teaser posters and urinal installations in the men's room of the nearby Speakeasy Bar and Grill just in time for spring break.
When gents pissed on the pregnancy test, it immediately registered a positive. Several shitfaced males were subsequently seen running out of the restroom, screaming.
Ad agency: Taxi.
Previously in: Urinal Pissvertising.