trying to change the ph of your uterus or create a fall out zone for sperm could also cause fungal diseases so..

"Honey! It was an immaculate deception!"

Just tell him that's not how it works, and that he has to drink bleach to kill his sperm before you guys have sex.

This is the first time I ever thought the results were unjustified.

I'm a guy and even I'm not that stupid. Plus vinegar would hurt really bad. Tell him to try dipping his penis in vinegar because he won't have sperm come out or something then watch as he is in pain

Another one failed by the education system

This is why we need sex Ed.

Technically, douching does lower the chance of pregnancy. However, since that effect is because it damages a person's fertility, as well as increasing the chances for pregnancy complications, in addition to all the other risks people have listed.

Wonder where Captain DUmbass got that idea? If it was from his parents, I wonder how many brothers and sisters he has...

break up with him. right now.