Here's a guerilla advertising effort by Johnson & Johnson in Brazil. The cardboard is positioned under the door and sells Jontex, a brand of condoms. The headline reads, "you do not know when it can be necessary."
This is not the only time the Jontex advertising team went creative. Here's another high profile placement . . . no explanation needed.
Other advertisers are also stepping up to the plate. Such as Durex, using strategically placed ads in subways:
And there is more restroom related health-advertising. This is a full-size cut-out mounted on top of the door knob, promoting hand-washing. The sign next to the doorknob says: "92% of guys say they washed. 34% were lying."