What is what does it mean when a guy drinks from your glass?

When a guy drinks from your glass, it can have various interpretations depending on the context and the nature of your relationship with him. Here are a few possibilities:

1. Comfort and Familiarity: If you both are close friends or in an intimate relationship, sharing a drink might indicate a level of comfort and closeness. It's often seen as a sign of trust and camaraderie.

2. Flirtation: In some contexts, drinking from your glass could be a flirtatious gesture. It might be a playful way to break the ice, initiate contact, or signal interest in a more personal connection.

3. Nonchalance or Carelessness: Sometimes, it could simply be an absent-minded action, especially in a casual or relaxed setting where sharing might be common and there's little concern about personal boundaries.

4. Cultural Norms: In certain cultures, sharing food and drinks is common and considered a normal part of social interaction, without any particular underlying meaning.

5. Social Etiquette Breach: Conversely, in some situations, especially formal ones, drinking from someone else's glass might be seen as a breach of social etiquette or personal boundaries.

The meaning can vary widely based on the situation, the personalities involved, mutual understanding, and cultural norms. If you're uncertain about his intentions, it's often helpful to consider these factors and communicate openly if needed.