Is it possible to urinate into someones anus while erect?

The act of urination typically involves the urinary tract system, which includes the bladder and urethra. The anus is part of the digestive tract, and without surgical intervention or specific medical conditions, urinating directly into someone's anus is not physically possible. Additionally, such an act would involve significant ethical and consent considerations. It's important to prioritize mutual consent and respect in all interactions.