For the most part, guys don’t have a problem with being called “bro”. What they do have a problem with is when the term is used by a female. And the reason is:
1. It’s a Term You Call a Friend
As a common term, Bro is often used between friends. When a girl calls a guy bro she is essentially telling him that he is her friend. If a guy has any interest in the girl, he does not want to hear that he is her friend.
2. It Shows Low Interest
Another reason is that being called BRO shows very low effort and lack of interest. Bro is a term you call a stranger. It does not make a guy feel special. The best thing to call a guy is his name.
3. It’s Very Masculine
Bro is a term usually used between guys. When a girl says it she comes off as masculine and unattractive. Guys like feminine women.
4. It Feels Disrespectful
Depending on your tone, bro can be perceived as disrespectful. If a guy does something you do not like, you might refer to him as bro, almost in a demeaning and upset way.
5. It’s Too General
Bro is a term that can be used for almost anyone, and can come off as very impersonal. It is not really something you want to be called by a girl you feel close with. My doorman in my building calls everyone bro, it is a habit.