Just saw this on the news here on the local FL news.
2 College students decided to use expand the advertising business to where people will see it - and read it- the most! In the bathroom.
They have even gone so far to offer their ads on their environmental-safe toilet paper and their revenue comes from the places which they sell it to. Most places where there is a heavy traffic volume, such as stadiums, bowling allies, libraries, gas stations, etc.
It's a interesting way to make money and for places to advertise! These students have figured instead of reading whatever magazine that are laying around, having advertisements on toilet paper in a location with a heavy traffic volume can bring out more revenue for those who advertise.
A very convenient way for both parties. The store, and well, the person using the bathroom!