Never is there a problem with it. I'm actually Bi and right now, my classmates never have problems with it because they support me alot, but there will be discrimination around the corner and always will you win, not the evil negativity from bullies. I'm only just going through the beginning. STAY STRONG!!!
What I mean "something wrong with them", maybe because they have bad past experienced such as getting raped, being hurt so much by opposite gender, childhood bad influence, lack of affection, and many more.
In the previous questions, you did mention your father sexual abuse you. The man that supposed to become your role model/indicator to choose a man, violate you. From that I can sum your bisexual behavior is derived from bad experienced with your father.