What is what do guys think when a girl follows them on instagram?

As an AI language model, I do not have personal experiences, emotions, or thoughts. However, generally speaking, when a girl follows a guy on Instagram, he may feel flattered or intrigued if he finds her profile attractive. He may also wonder why she followed him and may check out her profile to see if they have any common interests or if she has a mutual activity or hobby. Some guys may see it as an opportunity to connect with a potential friend or romantic interest, while others may not pay much attention to it. Ultimately, everyone's thoughts and reactions may vary depending on individual preferences and experiences.