I used to believe that conditioner was also called 'rinse.' I believe this is from the directions to "Apply Shampoo and Rinse" on shampoo bottles.
A childhood belief about bathrooms

others believed things like this
- I used to think that if i put conditioner in my hair before the shampoo my hair would fall out.— Jerry Moe the Gimp
- I used to believe that if you used people shampoo on a dog, the dog would turn into a human.Anon
- i used to believe that if someone take his bath with a hair shampoo, their body will become hairy.— roslin
- My friend convinced me that if I used a bar of soap to wash my hair instead of shampoo that I would go bald.— Michelle
- My older brother once told me that Aussie shampoo was made from kangaroo pee. I avoided using it for years!— Annie
- I used to think that "extra body" shampoo meant you could use the runoff suds to clean your body.— Christy