"Today, you can talk about POOP out in the open," the One Campaign trumpeted on Twitter.
Friday is World Toilet Day, an observance guaranteed to elicit giggles.
But the day has a serious purpose: Organizers call it "a day to celebrate the importance of sanitation and raise awareness for the 2.6 billion people (nearly half of the world's population) who don't have access to toilets and proper sanitation."
Haiti's cholera outbreak demonstrates how important proper sanitation is. More than 1,100 people have died, and thousands more are infected with the illness, which is spread by contact with fecal material.
Diarrheal diseases kill more children than malaria and five times as many children in the developing world as HIV/AIDS, according to UNICEF. Diarrhea stunts growth and forces children to miss school and adults to miss work, the agency adds.
The nonprofit World Toilet Organization is calling for improved water safety, more public toilets, better cleaning and maintenance of existing toilets, and acknowledgment of women's needs in public restroom planning.
"Studies show that women take longer to use restrooms than men. If there are three toilets for each gender, though, the women's room will have a far longer line. You've seen it happen in stadiums, theaters, and malls - that's because archaic building codes don't consider women's physiological needs," the group says on its website.
If you want to do something to celebrate the day, try visiting www.flushtracker.com. If you live in the United Kingdom, Ireland, South Africa or Poland, you can track where your "stuff" goes when you flush.
The default location for the U.K. page is Buckingham Palace.