A childhood belief about fear of

When I was younger, I had a weird fear of using the toilet after certain people had done so. If relatives were visiting and a boy cousin who teased me was the last to go to the bathroom, even if I thought I'd burst for having to go so bad I'd hold it in. I'd dance around and when my mom questioned, "Why don't you go use the restroom?" the response was, "NO, YOU GO FIRST!" I remember I once begged her to go and use the toilet because I had to go "so badly". I said this as though it were the most logical thing in the world. She once got very angry with me in one of these situations and said, very sarcastically, "Well, you'll just have to go in your pants, then." Imagine her surprise when I looked up at her and said, "Okay. What now?"