When a guy sends a girl the phrase "yes ma'am," it typically conveys respect and politeness. The term "ma'am" is a formal and courteous way to address a woman, particularly in some cultures or regions where it is considered a sign of politeness and manners. Using "ma'am" can be a way for the guy to show respect and acknowledge the woman's authority or seniority, especially if she holds a position of power, is older, or is in a higher social or professional status.
However, it's important to note that the meaning of this phrase can vary based on the context and the relationship between the individuals involved. In some cases, it may simply be a polite response to a question or request. In other situations, it could be a subtle flirtatious gesture, attempting to show admiration or interest in a lighthearted manner.
To fully understand the intention behind the message, it's crucial to consider the broader conversation, the dynamic between the two individuals, and their cultural backgrounds. If you're unsure about the guy's intentions, it's always best to ask for clarification or observe how he interacts with others to see if it's a consistent behavior.