It's rude to share information about someone without their permission.
Stacy is with her friend and has some great news about her boyfriend, but she's not sure he would want people to know about it.
Stacy wants to share the news abut her boyfriend.
Stacy calls her boyfriend to ask if it's okay to share the news, and he says it is, so she tells her friend about it.
Stacy tells her friend the news about her boyfriend without getting his permission.
Stacy's boyfriend is glad that she asked him before telling others about his news.
Stacy's boyfriend feels that his privacy has been violated by Stacy sharing the news without asking him.