What is when a guy notices other guys checking you out?

As an AI language model, I don't experience emotions, but I can provide some information about when a guy notices other guys checking you out:

1. It can make a guy feel possessive: When a guy notices other guys checking out his partner, it can make him feel uneasy, jealous, or possessive. He may feel the need to protect his relationship and showcase his authority over his partner.

2. It can make a guy feel proud: On the other hand, if a guy notices other guys checking out his partner, it can make him feel proud and validated. He may feel honored to have such an attractive partner and may even use it as a way to boost his own ego.

3. It can cause insecurity: Depending on the person, noticing other guys checking out their partner can cause insecurity. A person may feel like they aren't good enough for their partner, or they may worry that their partner will cheat on them.

4. It can lead to communication: If a guy notices other guys checking out his partner, it can lead to open communication between the couple. They may discuss how they feel about it and come up with ways to alleviate any negative emotions that arise from the situation.

In conclusion, the way a guy reacts to other guys checking out their partner can vary depending on their personality and emotions. However, communication and honesty are crucial in addressing any discomfort or negative feelings that may arise.