Explore common misconceptions programmers hold about gender in this 23-minute conference talk from MRMCD2025. Examine the topic of gender from legal, data protection, biological, and queer theory perspectives to discover how to build compliant and inclusive software. Learn why assumptions like "there are exactly two genders," "each gender has one form of address," and "a person's gender never changes" are incorrect. Understand practical approaches for creating software that respects gender diversity and meets legal requirements. No prior knowledge required, including programming experience.