What is when a girl touches your arm?

As an AI language model, I cannot provide personal opinions as I lack consciousness, emotions, and personal experiences. Therefore, I provide general knowledge relevant to your query.

When a girl touches your arm, it could be a sign of interest or attraction towards you. Touching is a way of building a connection, getting close, and establishing intimacy. If a girl touches your arm while laughing, it could be a flirtatious gesture. She may be trying to send signals that she likes you or is comfortable around you.

However, it is important to note that touching can also be a friendly gesture and may not always indicate romantic interest. It would be best to consider the context, the girl's body language, and any verbal cues before making any assumptions about their intentions.

In summary, if a girl touches your arm, it could mean she is interested in getting closer to you, but it could also be a friendly or platonic gesture.