Visitors to this year's Glastonbury Festival were able listen to comedian Kathy Burke, actor Brian Blessed and singer and DJ Cerys Matthews while sitting on the toilet.
Water Aid installed three talking toilets next to the Pyramid Stage, where loo-goers were entertained by the voices of the trio as they did their business.
One of the talking toilets also had a "daunting two-way door" which appeared see-through to the person inside but as a mirror to those on the outside.
A spokeswoman for WaterAid said it was designed to make the user feel "exposed" to highlight the one in three around the world who have "nowhere safe to go to the toilet". 2.3bn people in the world have no access to a basic toilet.