I had a professor in college that I took evolution and biology with. She started each semester with “I know what you all have been doing in the shower” …science experiments. This was in Florida. I was in Germany a few years later on vacation and I was in a bravarian castle when I see that same professor. I went up to her and she thought it was a joke that her family had put me up to until I said “I know what you’re doing in the shower”