There is no consensus on the precise meaning of this term. One common definition is that a Transsexual is a transgendered person who experiences severe gender dysphoria and feels they can " no longer continue to live their lives in the gender associated with the physical sex they were assigned at birth. " Many are convinced that nature has played a terrible trick on them. They often describe their situation as feeling that they are a woman trapped in a man's body, or vice versa. Some choose clothing, hair styles, etc., and/or adopt behaviors of the other gender. Some undergo hormone therapy and/or sexual reassignment surgery (SRS) in order to more closely appear to be of the sex that they feel they are. Some post-operative transsexuals do not refer to themselves as transsexuals; they regard themselves as having become either male or female.