A childhood belief about speaking

I used to believe that when someone said that a woman had been raped, it meant that a stranger had run up to her in the street and scraped at her skin with a cheese grater. In public school, a couple of older girls consistantly picked on me, and when I told my mom about it, she told me that I needed to stand up for myself. So I asked her if I could take her cheese grater to school. When she asked me why, I told her that I was going to rape them. Horrified, she asked me to explain, and when I was finished, she was laughing so hard that she had to sit down on the floor. Then she (very carefully) explained what it really meant. Even now (20 odd years later), if we're joking around and I'm getting mouthy, she pulls out her cheese grater and threatens to "rape" me.