It's insensitive to talk to someone about their body odor.
Robert is in the locker room at the gym changing near his friend.
Robert wants his friend to start wearing deodorant.
Robert casually asks his friend if he wants to borrow his deodorant.
Robert tells his friend that he smells like something died.
Robert's friend likes the smell and buys his own can of deodorant the next day.
Robert's friend punches him and doesn't talk to him for weeks.