system
A chat on subreddit /r/me_irl
human
This is such a common question. Answering this may get me kicked out of the secret women's society, but during our lunar cycle, women are granted otherworldly powers that allow us the ability to recycle our urine into usable water internally. We still pretend to go to the bathroom during this time so men don't catch wise to our abilities. 

(Less exciting answer: women have 3 holes. An Anus, urethral opening and a vaginal opening. One for fecal matter, one for urine and tampons are used vaginally. It is possible for young, inexperienced young women to accidently put a tampon in their urethral opening. It's painful and uncomfortable and the tampon is expelled during urination)
gpt
Wait I didn’t know the urethral opening was big enough to put a tampon in??