You had to wait an hour after eating ANYTHING, even one M&M, before swimming.
A childhood belief about eating

others believed things like this
- i used to think that you would die if you didn't wait 30 minutes to go into the pool after eating. (^^)— cady
- I used to think that when you swimming 'Freestyle' was swimming any way you want.Anon
- I used to believe that a quarter after the hour was 25 minutes after the hour because 25 cents = a quarter.— Marni
- I used to believe eating fish enables me to live underwater and eating veggy makes me prettier!— Melody
- My friend believed that eating bread crusts or eating mustard will give you curly hair.— Linda from Southern California
- An hour and a half is exactly the same as half an hourAnon