In the following case what is the possible ethical problem? explain

One of your co-workers is Joanne, a computer whiz with an offbeat style and a great sense of humor. Two of Joanne's favorite "targets" are you and Bill, another co-worker who tends to be quite standoffish in his business relationships. Joanne is the department clown and is forever goading you and Bill--you, because you're a great audience and clearly think she's hilarious; Bill, because she likes to try to get him to be more approachable. Joanne frequently alludes to sexual subjects and has called both you and Bill "little alley cats" and "studs." While Joanne's behavior doesn't offend you at all, you're surprised when Bill approaches you in the men's room and bitterly complains about Joanne's constant teasing.