Once when I was a kid and visited some relatives, they told me they used to have a dog but had to put him to sleep because he got sick, and they were worried he might attack their son. I thought that they were worried they might have to kill their kid too if he got infected...
A childhood belief about cats and dogs

others believed things like this
- The phrase 'Recycled toilet paper' always worried me.Anon
- When I was five or six, I was worried that I'd lost my heart because I didn't hear it beating.Anon
- If you touch your bellybutton, it will get infected.Anon
- I used to believe that when I went to sleep, my Barbie dolls would make out and plot to kill me.— ClaireRat
- After being told by my parents or relatives to "behave," I would usually reply: "I am being have."— Ed
- My parents told me that Jesus visited Santa Claus when he was dead for three days. — Rick Hamell