Fixtures
Simply urinating while showering does not automatically create an infection.
Good hygiene still matters, especially in shared showers, but the act itself is not considered a typical cause of UTI.
2. The Running-Water Association May Matter
The brain can learn associations between certain cues and bladder emptying.
Anatomy
If you repeatedly urinate every time you hear running water, over time the sound of water may become a stronger trigger for urgency.
This does not happen to everyone, but it is one reason some pelvic-floor therapists advise against making shower
