In recent years, some people have suggested links between autism and transgender people.[18][19] This issue has not been without controversy, as the issue is open to confusion; does the correlation exist, as some claim, due to an innate characteristic of autism that may also cause unusual discrepancies in sex or gender?[20] Or is it, as others claim, merely the result of exposing a group of people who experience difficulty in abiding by social norms, including those related to gender, to sexism and gender stereotypes?[21]