Historical and cultural circumstances create situations where certain industries and certain supervisors encourage or discourage appropriate working conditions based on sex. These circumstances often occur in industries like teaching, construction, or medical. This differential treatment manifests itself in the way employees are spoken to, paid, promoted, reviewed, or assigned work; however, it is illegal to treat employees differently based on sex, or perceived sex. Sex-based discrimination claims are still the most significant and frequent type of discrimination claim enforced by the EEOC. Employers should never ignore allegations of sex-based discrimination because the factors contributing to dissimilar treatment based on sex can be incredibly subtle but are required, by law, to be investigated.