No, but we are among the people who use their bathrooms alternately, not at the same time. If my son, suddenly at 16, wants to go to the bathroom with me, I'll take him to a therapist. :D
Edit: Actually, I should explain further, there are precise guidelines about who uses the bathroom when. Shower: 2 adults at the same time. Sink: 1 adult or 1 child at a time, never simultaneously. Toilet can be used in parallel (maximum for a small business). Bathtub: 1 adult, no parallel use of other sanitary items allowed. Bringing tea is okay.