The world is quite complicated. People get on your back because you don't fit in, you had a bad day, or they just decide that they don't like you. It's complicated in an understandable way. I've been teased on multiple occasions, where one person is trying to impress their friends, of whom are they same gender. That's rather nasty if you think about it... Moving on, when popular people found out that I was going out with a boy, they thought it would upset me to have them talk about the subject. I was pleased because they were taking time out of their day to recognize me and my boyfriend were together. Made no sense to me. They tease because they feel like they have more power that way. So, if you're being teased, ignore them, trust me, I know how difficult that is to accomplish. But do it, if they don't get satisfaction, they won't come back, simple enough. If things are getting physical though, talk to someone, quickly.