I thought that if you swallowed your gum, it would stay in your stomach forever, so you had to make sure to never do it because eventually there would be no room for food anymore.
Also, old CRT TVs had this static electricity sort of fuzzy feeling on the screen, and if you ran your hand over it, it would dissipate. I thought that by doing that, you were absorbing the TVs power and if you did it too much, it would eventually stop working.
Lastly, I believed with all my heart that all the pets you ever owned were waiting for you in heaven and it made me mad when my (very devout Catholic) grandma told me that pets and animals don't have souls and so they didn't go to heaven. I said if that was true then I didn't want to go to heaven! I'm atheist now, so I don't even believe that anyone goes to heaven, but if anyone deserves to go, it's all the kitties, puppies, and various rodentia I've loved in my life.
It's fucking barbaric. There are regions where it is considered tradition and the governments have a very hard uphill battle against generations of normalization and traditional culture. It really is just so very awful. I'm a cut male and I hate it. The skin is far too tight feeling when erect, but that is really not anywhere near the female version. I can't imagine how awful it is for women.