Thomas Szasz criticized the categorization of homosexuality and premenstrual syndrome (PMS) as mental disorders. He believed that such classifications were based on societal prejudices rather than objective medical evidence. Szasz argued against the medicalization of human behavior and emotions, advocating for individual autonomy and personal responsibility. He opposed the use of psychiatric labels to enforce societal norms and emphasized the importance of allowing individuals to express their sexuality and emotions without interference from the medical field.