I used to beleive that you couldn't drink water from the bathroom, be it the sink or the shower, because after all, it WAS from the BATHROOM....
A childhood belief about bathrooms

others believed things like this
- My mum used to tell me that you couldn't drink water out of the tap from the bathroom as it was poisonous.Anon
- that bathroom tap water was recycled "potty" water from the toliet. — livingdeadgirl
- I used to think that if you go into a shower nothing can hurt you because you're protected by water — Foxxip
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- I used to think when I peed in the shower as a kid, the water coming back through the showerhead was my pee.— gregg
- I used to think that trolls lived in my shower drain and showered with my dirty water— Troll bather