This term is used to express one's sexual identity or behavior as well, not just her sexual orientation. In fact, the only way to be sure is if she tells you directly. Additional stereotypes may include her:. While there may be hints that a girl is a lesbian, there are no clear signs that apply to everyone all the time. Straight people usually try to find out if a girl is a lesbian, but it's often more important for lesbians or bisexual girls to figure it out. For instance, this might happen when a teen is trying to see if she can come out safely to a peer, or if she's looking for a friend with similar interests.