If this doesn't make you hold in your pee until you're done swimming, we aren't sure what will.
In an interview with Women's Health, a CDC official confirmed that it's not the chlorine in pools that's bothering your eyes — it's other people's urine that's bonding with the chemicals and affecting your vision, and potentially your lungs.
So on that note, we'll just quote a backyard sign that's been a favourite for years: "Welcome to our Ool. Notice there's no P in it. Please keep it that way."
Also on HuffPost