Thrue story, happened to me 2 years ago:
I was having this typical discussion with my ex, trying to explain her that woman just don't poop and she was like ''Yeah we do poop what are you talking about?!'' and I was like ''...no /facepalm''. So she said she was going to show me and I was thinking ''ok what-ever...''
So the next day we both went to the bathroom and she tried real hard but farted for like 10 minutes non-stop....
So i was like ''I told you...''
The next day she insisted and tried egan... pee came out!
I was like ''YEAH... obviously, that's becose I just peed in your butt...''
The day after she tried egan... poo came out!!
I was like ''OMG... WHO THE FUCK POOPED IN YOUR BUTT!!!''
Dumped her the next day, she was obviously cheating.