A childhood belief about weeing and pooing

When I was little my grandma always stressed the importance of a routine to me. So every night for about two years at exactly two a.m. I would leave my bedroom and go into the livingroom, I would turn on the porch light and go outside. I would stand on the porch until the were no cars on the street the I would skip down the sidewalk to the other side of our house. We had this flower garden with several rosebushes in the back of it. I would walk in between two rosebushes and pee. I would almost always scrape myself on the thorns. After I finished peeing I would skip back down the sidewalk and back to bed.
My mom always wondered where I got the scrapes because I never got them during the day and they would always be there in the morning. I told her I didnt know where them came from.
After a couple of years of my routine my mom had fallen asleep on the couch, my dad didnt want to wake her so he turned off all the lights and the tv and let her sleep. While I was busy at my routine I had opened the door to go outside at 2 in the morning I was only 8. I had woken my mother and she screamed, "What are you doing?" I had replied that I was only doing what grandma had told me to do and I would like to finish my routine if that wasn't a problem with her. (I was mouthy)She told me to go to bed. I was so mad at her for not letting me finish my routine I didn't talk to her for a week. To this day she still doesn't know where all the cuts came from and what I was doing at two in the morning. Shortly after she caught me she had an alarm installed that went off when the door was opened, she made sure I never completed my routine again.