Believe it or not. It's the truth! I work in lab in a medical clinic. One of our female patients told me she can't give a urine sample at the clinic, and could she please take the container home and collect it there? She has sometimes been in the clinic bathroom for 20 -30 minutes without producing a sample. She admits it's psychological and told me she goes shopping only on short expeditions so she can go back home and use her own bathroom!
I am not good with public loos but the receptionist at work is even worse there are some events she will not go to because of it.