A childhood belief about fear of

I really think my older brother had it in for me. When I was little he told me that it was OK to pee into the toilet, but if I pooped a monster would come out of the toilet and pull me down into it. I really believed him. When I had to do the "number 2" I couldn't think of anywhere else to go besides behind the couch in the living room. I absolutely feared the toilet monster. My parents would always catch me in the middle of the act, and they worried about me for weeks. It got to the point where I would be behind the couch and my mother would say, "What are you doing?" and I would grunt, "Nnnnnooooothing" One day, I finally told my mom what my brother said...and, well, you can imagine how long he was grounded.