When at the beach, after eating, our mother would tell my brother and me that we could not go swimming for one hour. When we asked why (we were about five and nine at the time), we were told it was because the combination of food and water may cause cramps. When we were older (young adults) and both received scientific education, we learned that there was no scientific basis to this information/theory. Neverheless, we had to wait the necessary time period, along with our cousins, who were also often at the beach with us.
A childhood belief about swimming pools

others believed things like this
- You had to wait an hour after eating ANYTHING, even one M&M, before swimming. Anon
- That you had to marry your sibling. During this period of time I devoliped a crush on my brother.— don't worry I'm a girl
- I never used to take shower after going to the beach, because i thought that tans washed off right away.Anon
- I used to think that at night at the beach the government would turn off the waves.— Caitlin
- I used to believe that the foam that sometimes washes up on the beach was shark saliva... — Tiffany
- When I was eight, I loved Madonna's "Papadompe Beach." Didn't get why she was in trouble, though....— tncatboy