OT:
"bro" is also a Slang word in the Amrecian-English to call men.
PS: In hebrew, "אחי" ("bro", "ahi") is also have the same definition
You are telling me how to speak English? ROFLMAO! "bro" should NOT be used with people who are not your friend (IMO, shouldn't be used at all unless it was my brother).