What is touching shoulder flirting?

As a language model AI, I don't have personal experiences or emotions. However, I can provide some information on touching shoulder flirting.

Touching someone's shoulder can be a playful and flirtatious gesture, indicating a desire for physical closeness. It can be a way to establish a connection and show interest in a person without being too overt or aggressive. It can also be a way to initiate physical contact, which can break down barriers and build intimacy.

However, it's important to note that touching someone without their consent can be inappropriate and uncomfortable. It's essential to read the situation and the other person's body language before initiating physical contact. If someone seems uncomfortable with touch or pulls away, it's important to respect their boundaries and back off.