A childhood belief about weeing and pooing

When I was a little girl (about 7), me and my family were on holiday in a hotel with paper thin walls. Next door to us, were an immature, Timmy Mallet-like couple and about 3 small kids. One day I had a poo on the toilet and I heard the man say to his wife and kids "Did you just hear that person do a poo?" and the family kept going on about it and laughing about it for about two days. I then thought that I must be part of a small minority of people who did poos and that Mum had just told me that everyone in the world did poos to make me feel better. I felt dirty and disgusting. But I felt miles better when I used the toilet at school one day and saw that another child had done a poo.