Is shoving a banana up your vagiiiiiina bad?

Answer 1

Yes, it can cause a rupture in your vaginal canal, which can in turn lead to permanent damage from internal bleeding. It doesn't really matter. It's more for self-satisfying purposes. As long as you clean your hands and be careful to not insert anything in there that could cause you to have internal bleeding and such, you should be ok.

Your vagina is slightly acidic, that could help kill off some bacteria you have on your fingers to prevent them to transferring them to your insides.