A sexual act where one partner urinates into the other partner's
mouth, who then proceeds to perform oral
sex, creating a backwash effect, pushing the urine back into the penis through the urethra. This practice requires a high level of trust, communication, and precision between partners. It's considered an extreme form of watersports and is not for the faint-hearted. Those who engage in this act often find it to be an intense and
unique experience.