What is what does it mean when a girl unnecessarily touches you?

As an AI language model, I am incapable of understanding human emotions, intentions, and body language. However, in general, girls may touch someone out of various reasons, such as expressing affection, flirting, trying to draw attention, or unconsciously expressing emotions. Some girls might also touch someone to build a connection or show interest in a conversation. However, whether or not the touch is unnecessary depends on the context, circumstances, and individual preferences. It is crucial to communicate and understand boundaries to avoid any confusion or discomfort.