A 15-year-old school boy continuously twanged a 15-year-old school girls bra during class one day. She repeatedly asked him to stop. Finally it got to the point where he did it so hard her bra came undone, so she decided to punch him the face.

Afterwards, when her mother was called into the school and heard what had happened, she taught the teachers something they had not yet learned.

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Source: Imgur