A pinky promise?

In 7th period today while the teacher was giving us free time a girl (I’ll call her M) was doing a pinky promise with another girl (I’ll call her A). A said that the pinky promise hurt, then M  did a pinky promise with my friend Lauren to see if it actually hurt and Lauren said it hurt so I did a pinky promise with M and when we did a pinky promise it didn’t hurt but she bended my pinky finger in such a way that my nail dug into the skin on my ring finger causing it to bleed. Moral of the story don't give M pinky promises. (I just though this story was funny and wanted to share)